It's a hard decision. With Thomas the offense is fantastic, but there maybe too many ball handlers.
Eh? No, you can't have too many ballhandlers.
On the other hand, Boston badly needs a player or two who can create shots off the dribble.
If I'm not mistaken, that is why they got Jaylen Brown. Given his youth, versatility, and stopper potential, acquiring Hayward makes less sense. Excellent chemistry with Crowder, and Crowder can guard bigger players while Brown can guard quicker ones. Crowder, btw, is one of the best shooters in the league at his position - he's the perfect complementary wing.
Wing is a strength going forward, especially as Brown matures into his game. He needs to play.
Given the other thing that Boston badly needs – defensive rebounding – it would be better to get a big than another wing, especially if you're already taking Fultz, who can play on or off the ball.
Bradley maybe the perfect fit for Fultz and Hayward. I'm leaning towards keeping Avery.
Bradley is a great fit for Fultz - he can check the opposing point and avoid having his size exploited.
Hayward? I'm lukewarm. You disrupt too much of what's working if you add him.