His role is heavily reduced. If everything works alright he’ll only appear in that ending scene in the council room.
The one where he say’s “begun the clone wars has”? I don’t know if you’re leaving it out of taste, but i think that scene could get the axe. It also makes sense that the name Clone Wars was something added by later generations. Like how WWI was known as the Great War in its time. Only WWI later when the 2nd war began