Chaos Knight Alignment Issues
Being Lawful/Neutral is too beneficial for Chaos Knights compared to Chaotic
At present, Chaos Knights have some pretty severe gameplay restrictions for having a chaotic alignment--they can't get basically any of the early quests, can't pass the Eternal Guardian without fighting, etc. Upon switching to Neutral (which is a bit of work, but not insurmountable), all of these disadvantages immediately go away, and you can pretty much play as normal, as long as you have a bit of fire resistance to deal with the damage taken from being misaligned. I think this is a little too severe--the penalties for being C as a Chaos Knight are far too large compared to being N or L.
What I'd suggest:
-Allow chaotic Chaos Knights access to some of the quests that they currently can't. Eternal Guardian in particular stands out as a very nasty one. As does not allowing them to do Village Dungeon for Healing (IMHO, this should be changed to allow Chaos Knights to access the VD via the Hotzenplotz quest).
OR
-Change it so that N and L Chaos Knights also can't access many/all of these quests.
OR
-Increase the penalties for Chaos Knights being L and N. Perhaps their class powers are only active while C.