You're not the first who's been in this situation re: later canon revealing more powers that they would have had at their earlier canonpoint, so no worries! If you could give us a rundown of the new powers (just explaining them here is fine), we can workshop nerfs (if necessary) with you.

As for your second question, stuff like that is generally handled on a case by case basis! I'll touch base with my comod, and we'll discuss and get back to you.