1) Karma isn't a real requirement.
It's a requirement, I understand it's very easily maintained (also takes no skill investment). but Necromancy works the same way with negative karma (to a similar, but lesser extent)
2) This isnt about changing chivalry, this is about changing remove curse. The reason for remove curse needing to be changed is due to the introduction of Holy Fist and it becoming an all encompassing offensive and defensive power house.
One offensive Mastery spell warrants a 33-50% speed reduction in one defensive Chivalry spell. not necessary, Holy-fist isn't that hard to live through
3) The power of chivalry is further just augmented by the fact that you no longer need to give anything up to be a 4/6 chiver (13 years ago you needed to add meditation and drop resist or healing or anat or some other skill to make the temp remotely viable and even then you probably weren't all 70's with max mr and mana increase on every piece). Today, you don't run out of mana and you can easily augment Chiv's great defensive spells by incorporating Spellweaving, bushido, alchemy, resist, and/or animal taming through jewels.
Necromancy can cause you to run out of mana if you use it correctly, the main reason I never liked to incorporate suits into the argument is because suits as a whole have gotten better for every template, not just chivalry.
On a mage the only way to kill the pali is by stacking debuffs and quickly dealing out damage, which is near impossible with the Remove Curse cast time and mana cost (won't even take into account all the other crap that can easily be paired with it).
a Mage stacking debuffs? Those debuffs being Poison & Curse. both of which are removed by two different spells.
a Necro-mage can render chivalry less useful. (=X), everyone seems to be going right around it.
Spell-weaving can reduce casting speed/recovery, as well as cause additional interrupts with summons*.
Mysticism can slow casting to those without resist, as well as having a very good defensive lineup, if you use mystic mastery... can cause mana issues to targets as well as restore mana to the mystic. There are many counters that almost no one uses....
Honestly, it seems to me the problem is everyone wants to remain at 30% sdi (focus spec) and be able to kill everything with similar tactics & difficulty.