Good post. I altered it a bit to be more reflective of the issues at hand.
In no particular order...
They are not numbered in any specific order, but I have bolded and underlined the changes that are absolutely essential in needing fixed. Those are the hottest topics and most intensely debated on this forum. They are the root of why so many of us are unhappy and need to be addressed.
I'm afraid I can't agree with your additions, and don't see most of these as being hotly debated issues except by the PK types. Further, these changes would drive away many members of the non-PvP community (the majority of us) and potential recruits from other shards and would be very unlikely to be accepted by the Devs:
4) I am not going to force the issue on faction items, I am just resigned to this being a split shard. So okay, just lower the silver costs. But I would still like to see a convincing argument for why Siege needs the extra mods on the faction arties other than PvPers want their uber-items.
5) and 7) Should still be grouped into one topic. It requires very careful consideration about what, if anything, needs altering.
8) Altering housing would not be a good idea. It would drive new and existing players away. No matter what efforts are made to improve PvPing to encourage the return of a portion of Siege's population, the shard's future lies in getting new folk over here.
9) Instanced dungeons is fairly inconsequential and I cannot believe anyone has quit the game because of this. You spend time getting the keys, you deserve the chance to do it in peace. Back in the day when REV/OTF ruled this shard with an iron grip, you were raided at 80-90% of spawns and in Doom, were frequently PKd whilst resource gathering and could be killed in town if someone was determined enough. Peerless were the one boss-level thing you could do, and even then you were often attacked getting the keys or even coming out after the hunt. Further, this would require a lot of effort by the Devs to come up with a new mechanism to enable anyone to access the areas.