I am fine with the feat taxes; they don't do much for me overall, but it does add a bit of daunting rewriting as a GM. A quick and dirty method is adding some flat bonuses to all enemies and only rewriting major NPCs or ones you like. So no biggie.
I may update Katrina after I realized that blood kineticist is compatible with psychokineticist. Haven't decided yet. Wrack is thematic, Foe Throw is full of amazeballs, but being limited to only physical blasts until 15th level is... undesirable.
Also, 2 questions for the great and powerful GM
1. Kinetic healer states that it heals damage; it does not indicate a source whatsoever (namely positive energy). Would it be safe for Katrina to use on herself given her infusion of negative energy or do I need to make it to the void healer?
2. If I use that on someone else and make them take the burn, do they get regular Burn (1 nonlethal/HD) or the psychokinetic burn (-2 Will saves and all Wisdom checks)?