I wouldn't be surprised if it's been discussed before, but one thing I would do is remove this guy from the separatists meeting in AOTC:
http://starwars.wikia.com/wiki/Wat_Tambor
1. Because his design is really silly.
2. You could replace him with Grevious with little difficulty and thus make his appearance in Episode III significantly less jarring if you haven't seen the clone wars cartoon.