You should specify which abilities are (Ex) and which are (Su). Push the Limits is extremely powerful and should probably be reduced to a certain number of uses daily.
It also might make sense to have this progress spellcasting at at least a few levels (maybe ever even level?).
Regarding the feats some of them are more balanced than others.
Extra Recharge is quite weak. With only +1 a day I have trouble seeing anyone ever taking that.
Some of them also have wording that needs work. I'm not completely sure what you mean by Wand Savant's "You provoke out to 10ft. when holding a wand"- I presume you mean that others provoke attacks of opportunity with the wand on you?