You know what? Keeping in mind that Capcom can screw up balancing sometimes, this is my suggestion for making it as simple and un-screw-up-able as possible. Do as few untested or new things as you can, and if a character isn’t screaming for an untested change, don’t do it. Some of these characters kind of annoy me, but I’d rather face a characters I know is really good but not broken like Super Cammy or AE Seth than risk Capcom screwing things up heh.
–Return to exact Super incarnations (12 chars): Abel, Boxer, Cammy, Chun, Dhalsim, Guile, Honda, Fei, Dictator, Rose, Rufus, Ryu
–Keep exact AE incarnations (12 chars): Adon, Akuma, Cody, DeeJay, Ibuki, Juri, Ken, Makoto, Sagat, Sakura, Seth, Viper
–Combine obviously better parts of Vanilla, Super, & AE incarnations (5 chars): Blanka Super horizontal balls + AE everything else, Claw Super cosmic heel + AE everything else, Fuerte Vanilla RSF/tortilla/guacamole/u1 + Super u2 + AE normals, Gen Vanilla jumps + AE everything else, Zangief Super everything + AE spds/u2
That leaves only 10 characters needing slight changes: Dan, Dudley, Evil, Gouken, Guy, Hakan, Hawk, Oni, Yun, and Yang.