The Celtics shook up their rotation. Now what?

David Butler II-USA TODAY Sports The Celtics have looked marginally more capable with a tightened rotation. That’s how it usually works, right? Jeff Teague and Grant Williams are mostly out, Aaron Nesmith is in, and Javonte Green makes guest appearances.

Herein lies a longstanding conflict I have: nobody knows who’s playing from game-to-game.

The rotation shakeup is pretty well justified. Grant Williams, who I appreciate and will always believe in, needs to hit the reset button. Individual player production is what it is, but Grant looked visibly frustrated at almost all points in the game, which is a losing formula. He doesn’t deserve any blame, just a break. A vacation, if you will.

Boston’s…