Being able to see read the field earlier and get the ball out on time - alone - will significantly improve Wimbush's accuracy. Many of the poor throws we're seeing are because his brain and his body are out of sync or he's throwing the ball where he intends, but he pulls the trigger after everyone else in the stadium identified the open receiver.
Even in his "better" sophomore year, Kizer had some accuracy issues (especially with one hops) due to some issues with fundamentals. IMO, more often than not, what I think I've seen from Wimbush have resulted from what he is/isn't seeing on the field or a lack of confidence in what he is seeing. When he starts getting the ball out on time consistently, then maybe other things will stick out more. But that's what I see first. And that's something that can can improve.
But IMO he's shown the ability to throw with accuracy when he's decisive in pulling the trigger.