Thibs isn't a bad coach, he is one of the greatest coaches in NBA history. He's the man behind the '08 Celtics and '11 Bulls defensively, and has coached other great defenses like the '99 Knicks and '07 Rockets. He is a great defensive mind, and a lot of his defensive principles the loading of the strong side, the zones, forcing the long two that was copied throughout the league. The problem is that the league has responded to those defensive principles with the P&R and three point implosion you see today. Offensively he doesn't bring much the table though, that's for certain but he's proven that he can lead his teams to grind victories even when D-Rose was injured in Chicago.
Butler was a terrible acquisition to me, because he and Wiggins are redundant. Just a classic case of Thibs going after his guy, instead of team fit. Wiggins and LaVine had a legit case for G.O.A.T. athletic wing tandem. Team is just a bad fit with four ball dominant players in the starting rotation. If they kept Markannen and LaVine they'd have two 40% 3PT shooters in the starting 5. I have to see how they maneuver through this season.