Let's be honest with ourselves, he is a middle of the pack PG and would be/is a better off-ball SG. However, he lacks size to be a full time SG. The team's current success is more related to JB, JT and Big Al than Scary. Scary is the equivalent of the QB that manages a game, than a Tom Brady/Kyrie. Sure he'll make a couple of great plays a game and there is that one out of 10 games where he takes over. But generally his style (IMO) is to play it safe with the dribble penetration and passing. Now, don't get me wrong, there is nothing wrong with that style as evidenced by the Celtics playoff run. Just saying let's be honest with how scary Terry truly is.
PROS
Decent handle (average to plus)
Average 3P shooter
++ rebounder
above average defense
++ athleticism
+ Clutch
CONS
natural SG - but lacking size
lacks PnR game
below average passer
below average vision
What to do with Mr. T Rozier III?
If I am Ainge, I hold on to Terry unless I receive a godfather offer for him. Remember Kyrie and Gordon will be coming off injury and may have minute limitations to start the season. Second, can't hurt to have an awesome bench of Smart, Rozier, Morris, Theis and Baynes that can play significant minutes and keep the starters fresh for the playoffs.
A godfather offer starts with a top 7 pick in this year's draft. Perhaps (unlikely but you never know) the NYK had enough of the oft injured Kristaps and would take T-Roz and some draft picks (BOS 18, SAC 19, MEM 19-21).
Projected 2018-19 Roster
Horford
Tatum
Hayward
Brown
Irving
Baynes - resigned MLE
Theis
Morris
Rozier
Smart - resigned 4/44
Ojeleye
Yabusele
Bird
Larkin
<Draft Pick>
Gone
Monroe
Nader