Morris. His talent level is pretty high for the price, but he's just not a great fit with Hayward + Tatum + Brown + Smart on the roster. His defense on LeBron was commendable at times but it's also not clear how much it would benefit us with all of those guys available (+ Semi?).
In addition, he won't be happy with a smaller role, is the only real ball-stopper on our roster, and is a bit of a head case.
In a vacuum he's still a pretty good player for $5M/year coming off the bench, but I think the Cs would have no problem moving on.