I have a soft spot for the Bucks and I follow them just as much as I follow the C's (especially this season that the C's underperform). I wouldn't do it for the Bucks. They need to surround Giannis with floor spacers, not slashers. I'd do it in a heartbeat for the Celtics. Donte isn't 100% ready yet, but he'll likely find his old self sooner or later.
If I were the Bucks, I'd be looking to trade Donte for Mo Bamba. Brook Lopez is out indefinitely after a back surgery. The Bucks were running a drop scheme on defense with Brook. They now run hedge and recover in the absence of Brook. Acquiring a rim protector would allow them to run a drop scheme once again with Giannis operating like a free safety.
Giannis is the best help defender in the NBA. He's everywhere at the same time thanks to his elite physical tools/athleticism. If the Bucks wanna maximize his defensive impact, they gotta pair him with a rim protector. Likewise, if they wanna maximize his offensive impact, they gotta pair him with a stretch 5. Bamba ticks all the boxes.