CS, I agree about the name "red wizard," it seems pretty generic, but the "Thay" has to stay out, and the Red Wizard prestige class isn't
OGL (
AFAIK-it's not in the
SRD). I don't think we should let people use anything resembling the
FR background, etc.
I'd rather have our own prestige classes, too. But the
DMG prestige classes are pretty universal - I can't imagine not having arcane tricksters, shadowdancers, etc. My 2 cp's: keep the
SRD PrC's (which doesn't include Red Wizard).
Maybe add some Living Enworld flava - i.e., Loremasters can study at the Arcane College of X, Duellists can train at the L'Avandian Fencing Academy, Eldritch Knights are supported by the Grey Elves of Whatever, and so on.