Controversial Trade Idea

Say we get the 4th pick of the draft. Would you trade that pick for Brad Stevens? The premise of this trade is that we would get an outstanding coach. Stevens is legitimately worth about 15-20 extra wins a year. Ainge was trying to tank last year and they still won 40 games. Also, Erman worked with Stevens last year.

Problem is that Boston would probably say no, because they have a balling GM that has already been stacking 1st round picks for days.

Would a coach of this caliber be able to get through to some of our low iq ballplayers or would we still need to blow the roster up?

Thoughts?