Consistency in Kingdom Hearts
On a serious note. There's a crucial difference between going back to decades-old games in some sort of revisionist history crusade and dubbing (not really redubbing, is it) flashbacks to historical scenes in future games (which will almost certainly be reanimated anyway).
Thought experiment: If they went back and Ministry of Truth'ed the best acting performance in KH history so that Birth By Sleep Xehanort could be consistent with the "performance" of him in the latest titles, would this be OK in the name of consistency? Of course not. And I'd legit look into whether those responsible could be tried under some obscure and forgotten common law dating back to the 16th century or something.
Then again, this is George Lucas mk2 we're talking about, so..
I never said they should remove Quinton from every past game, not even for consistency (with the Billy Zane example, I meant so it would be consistent within KH2 itself).
Replacing Quinton in KH3, and only KH3, may still be viable because it is one of the most recent games in the series and is still fresh in everyone’s minds.