MT isn't a go to player,even though you might get punched if you told him that to his face. What he is, is a potential killer support player. A go to player has to be able to either create a good shot for himself, or teammates, even when the defense is geared towards stopping them and everyone in the arena knows where the ball is going. We have two guys who can do that, Cuz being the first option, Reke being the 2nd. Are they great at it? No. But if Smart would actually put them into a position to grow into it and get used to it, they'll get there quicker. I don't see another guy on the roster with the potential to pull this role off.
Then there's MT. He shoots like a #1 option. But really, where he's at his best, is when Cuz or Reke draws attention, the ball is swung or kicked, and there's MT coming off a screen, spotting up, or slashing to the hoop. Killer 3rd option. Can be great playing off others. However, a funny thing has happened of late, where others are put in a position to play off him. That won't work, not for MT, not for the other guys.
You need a guy or two who can shift the defense, cause double teams, cause rotations, and generally command so much attention if makes life easier for others. Reke and Cuz have both shown they are that type. MT can not cause a defense to do that. He can however, be one of the better options for when the rock is swung out of a double team, or when the defense is scrambling. Just not sure it'll happen with this team or with this coach.