Quote Originally Posted by eftexar View Post
It's definitely straightforward, but adds a much needed boost to classes like the fighter and does it rather elegantly considering the fact it mostly just grants extra feats.
The only thing that irritates me is the keen edge ability. I don't remember in particular if improved critical has any feats based off of it, but if it does (and it probably does), players might still get stuck taking the improved critical feat making this sort of meh. All you would need to add is that any feat that he qualifies for because of keen edge only applies to the weapon in question.
Improved Critical has a BAB prerequisite of +8. If you enter the class at 6th level, there's no way you could already have it.