JT is just about as good a 3rd big as a team can hope for. He is a 4 that can play a bit of 5 and is a solid spot starter. Good role player. Rebounds, brings energy and hustle.
He is not a starter on a very good team but he is a VERY good 3rd big coming off the bench. The big that does a little bit of everything but nothing at an elite level. I would re-sign him. Always thought he is a good role player to have around and he is a hard worker and good locker room guy. I would keep but I would also look for that starting PF/C that complements Cousins and JT well.