Rozier has become a very efficient player offensively.
It would be a huge upgrade in our outside shooting from 3 point range.
He would be awesome guarding quick guards like Sexton and Fox defensively, guys that Smart really struggles with defending.
He has improved as a playmaker, averaging 4 assists per game now, and has a 2/1 assist/turnover ratio, which is quite good. He would click right away with his former teammates Al Horford, and the two Jays.
To me this is such a no brainer trade, I just doubt that Michael Jordan would agree to it.