The stuff with her mortal family and the Amazons doesn't have to be exclusive though. I think mainly because the whole purpose of Donna's character initially was to be the superheroine called Wonder Girl, so she really does need to have a concise connection to Diana and the Amazons. Without it, she falls apart as we've seen. I agree that having Diana be the one to rescue her has never made complete sense but that's the only thing about her pre-COIE origin that needed tweaking. Everything after it is inferior.