Isaiah is a terrific scorer. I think that's plainly apparent to anyone who watches him play. He's also decent to good at setting up teammates when he wants to. The problem areas are wavering defensive effort (which has only gotten worse as his scoring role increased), high volume of shot attempts, and most significantly that he gets tunnel vision and completely ignores everyone on the team when he decides that it's his turn to get a basket. Unfortunately, this often happens at the end of the 4th quarter when defenses are keyed in and every mistake is magnified. I got tired of watching opposing PGs blow by him for the 25 minutes a game he doesn't think he needs to play hard defense, watching him get caught on picks constantly forcing everyone else to rotate out of position, and watching four players stand around while he took pull up jumper after pull up jumper. There's a limit to how far any team will go with him as the starting PG primarily because he doesn't seem all that concerned with learning anyone else's favorite spots and how to set them up consistently and he's passable at best as a defender. He's a solid rotation player who's ego will only accept top-billing. That's why I didn't mind seeing him go.
Brad Stevens is a good coach though. I think IT will be an important player for Boston and Stevens will get a lot out of him. There will be games when he's the best player on the floor. There will also be games when Celtics fans are pulling their hair out as he dribbles all over the court and shoots them out of the game. Basically he's a 5'9" Kobe Bryant. Ultimately I think he may be too much of a distraction for what he brings you, but it'll certainly be an entertaining ride. Good luck!
Brad Stevens is a good coach though. I think IT will be an important player for Boston and Stevens will get a lot out of him. There will be games when he's the best player on the floor. There will also be games when Celtics fans are pulling their hair out as he dribbles all over the court and shoots them out of the game. Basically he's a 5'9" Kobe Bryant. Ultimately I think he may be too much of a distraction for what he brings you, but it'll certainly be an entertaining ride. Good luck!