Sorry bro, but I'd have to disagree here.
The main point being that wizards need the extra spell pen boost from enhancements and free feat slots from free metamagics, in addition to thier versatility of spell selection, in order to remain viable compared to sorcs. Sure sorcs can still take the feats...but in doing so they limit their available metamagic and other feat options.
Now I know if this were implemented that a human wizard would see the same benefits, but the wizard needs those benifits exclusively, over the sorc in order to remain a viable class.
Perhaps I'd agree with the DC boost, but I agree that +4 is a little potent. Maybe +2.