Seems to me you had one whale of a great idea for unified handling. I'd like to see that out in the open again!
You mean this one? Just one of many of my ideas

Now lot test if this forum can handle long texts
I would make a single unified rule set included a PvP switch
I don't believe many would quit if we made Fel ruleset for all facets, special not if we added a switch, that will make it possible to choose to become a non PvP'er, if ready to accept less advantage.
We would need a color flag more, Maybe purple unless the GM's use that color.
Players will start out as blue (PvP off).
A blue player can't be attacked of players they are not in war with.
A blue player can't be looted of players they are not in war with.
A blue player can't be stolen from of players they are not in war with.
A blue player can challenge an other blue player or green player to duel. This will be a no loot duel where the player will raise with all their items.
A blue player will go grey from crim against npc's, but can't be attacked of players.
A blue player can't attack, loot or steal from purple(PvP) or red(PK) player without turning PvP or PK flag on
A blue player can't heal, cure, buff or res a purple(PvP) or red(PK) player without turning PvP flag on
Purple (PvP on) and with PvP in their tag
Players can turn on PvP, it will then stay to they turn it off. There will be a delay of 5 min after their last PvP action against reds and 1 hour after their last PvP action against purple.
Attacking, stealing from or looting a red player will reset the 5 min and if the player are blue, it will make the blue player purple for min 5 min.
A purple player will gain 2x resources from loot or resource spawn and he will gain 2x fame.
Healing, cure, buff or res a purple(PvP) or red(PK) player will reset the 5 min PvP timer.
Looting a npc corpes killed of a purple(PvP) or red(PK) player will reset the 5 min PvP timer.
Attacking or looting a purple player will turn a PK flag on and turn the player red for 1 hour (ingame)
I have a problem with thieves here, maybe they also should have 1 hour red PK flag but will be able to hide it. If they are in thief guild, the PK flag will only show for 5 min, then they will look purple until attacked. Attacking a thief with hidded PK tag will turn the thief PvP tag/color visible again for 5 min.
Red (PK on) and with PK in their tag
Old murderer count will be removed and red chars will get a 1 hour red PK flag/timer. If in town when they login with old counts they will be teleportet to their house or a house they are friended/accessed too.
Attacking or looting a purple player will turn a PK flag on and turn the player red for 1 hour (ingame)
Everytime the the PK do a new crim against a purple player it will reset the red flag to 1 hour.
Attacking, looting or stealing from an other red will only reset the purple 5 min flag (The red PK color will dominate)
Healing, cure, buff or res a purple(PvP) or red(PK) player will reset the 5 min PvP timer but not the 1 hour PK timer.
A red can't go to town, guards won't allow it. Going red in town will be a bad idea.
Warring enemies (orange)
Purple players will look orange to warring enemies but with PvP in their tag and flash purple each 5 sec.
Red players will look orange to warring enemies but with PK in their tag and flash red each 5 sec.
Attacking a orange with PvP or PK tag will not effect the PvP or the PK flag/timer
Healing, cure, buff or res a orange with PvP or PK tag will start/reset the 5 min PvP flag/timer.
Orange can not attack each others in non Factions town. That will count for guildwars too.
Players in factions will also gain 2x resources and fame but players in guildwars won't unless they are PvP flaget too.
Faction will be active on all facets
Factions taxes will only effect Factions players
Other rules
No trading between PK/PvP and non PvP char outside town unless in a house one of them own or are friended too. PK's and PvP chars can trade just not with a non PvP char. The non PvP char will have to turn pvp on first.
A Non PvP'er can't pick up items from ground placed of a PvP or PK char and can't loot a PvP or PK corpes or creature killed of a PvP or PK char. He can choose to turn PvP on to do it.
A PvP'er or PK can't pick up items from ground placed of a non PvP char and can't loot a non PvP corpes or creature killed of a non PvP char.
No looting of other non PvP corpes or creature killed of an other non PvP player unless green or orange or in party.
PvP players can loot each others corpes and creature killed of a PvP player but will become grey.
No healing between PvP and non PvP chars. Ressing would be ok, also of pets.
No blocking between PvP and non PvP chars or between non PvP players.
Guilds/chars can only switch once a month. It will take 2 weeks before it take effect.
Pets would have same color as their master and same PvP flag. That mean a non PvP pet can't be attacked and pets can't be traded between PvP'ers/PK and non PvP'ers in the wilderness.
Here is a problem with friended pets, think a friended pets color will be effected of any friend/owner on screen, so if a blue owner and a purple friend to the pet are on the screen, the pet will be purple for maybe 20 sec after the purple friend leave the screen
With this rules, we do not need the trammel rules, all facets will have this ruleset.
Some non PvP'er will find it unfair, that purple PvP'er and Factions will get 2x resources and fame, but it's fair enough, they can easy lose 50% to red PK's or to Faction enemies.
Red PK's won't get 2x resources and fame.
If you logout with a flag and x mins timer, you still will have the x mins when you login next day.
There will still be a problem with players macroing of the timer as ghost or in house. Think it should be ok with the purple PvP flag but not with the red PK flag.
Maybe it should not be possible to macro of the PK flag as ghost or in a house.
Even when many will fear to go purple it won't mean everyone will attack them. They will mainly have to look out for reds, most other purple won't attack.
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I had an other and more simple system
The problem is, if you concentrate the PvP'er on a few shards, it will be to hardcore for the middle group. It would be better to changes the rules to make it more easy to find a target.
What I want from it:
1. More simple, we do not need several different PvP systems, 1-2 is enough
2. It still need to protect players who don't want to PvP, but without protecting Noto PK's and grieffers.
3. It need to be the same on all facets.
How to do it?
1. Remove all systems and flags and start over. Make one war system, factions with some fix may work. The murderer system will be fine too, if it get some fix.
a. If a blue attack an other blue, he will become grey for 2 min. The curser will be in the color of the players flaging. If a blue is killed of a red, his insurance will auto renew without cost for him.
b. The victim can choose to fight back or run. If the victim do fight back, he will become grey too.
c. Auto attack when hit of a player need to be a choose in options, than can be turned off.
d. If a grey kill a grey, it will be a PvP kill and no punishe for it, but if a grey kill a blue, he will become red. (we need a fix for suicide here)
f. A red will not be able to insure items, and he won't get insurance money when he kill a blue. It will take 10 hours for a red count to decay.
g. If a blue or grey attack a red, they will keep their color, that mean, a red can fight grey without getting more counts but if he kill a blue he will get a count more unless the blue was attacking him first, then he won't get a new count.
How will this changes PvP?
1. Not many will want to be red, so killing an unwilling blue will hurt.
2. It will allow all to challenge someone and if their victim accept = fight back, they got a fight. If the victim do not accept, the attacker can stop the attack and won't become red.
3. A blue who don't want to fight will make his killer red if he choose not to fight back and do die. If he damage him self, he will become grey, so killing him self will not make the attacker red. Also having a friend kill him, will make the friend red.
4. Sure life will be harder as red, but we will get alot grey PvP and Noto PK's can't hide behind a blue flag unless the target is red.
5. It may sound bad, that fighting back will make you grey, but anyone who want to noto kill you will become grey too. Tracking may be a good thing to know how many there is around hidded.