I wouldn't. I know why some people would, there's a big hype around Celtics player now. I think many of their players are the result of the system they have in Boston. I don't believe Rozier, Smart, Baynes, Brown, just to name a few, would look the same in a different team.
The team that will overpay for Smart this summer will regret it, I'm sure. Same thing for Rozier. You don't buy high and sell low. That's what we would do trading WCS for Rozier, and then we would complain why WCS looks so great in their system and Rozier is half of the player he was in Boston.
Also, we already have Fox. Rozier doesn't make sense for us, unless you want to trade Fox, which I don't want.