Big fan of Holiday, and I am not excited about his being a part of the Celtics.

Holiday does make them much better, however, I think trading Williams will hurt them.
Williams was more than solid for the Celtics on D, and his moving on leaves them pretty thin up front as Horford is 37 (when will he hit the wall?) and Porzingis who is injury prone. Of course Williams was also oft injured.

The Celtics off season moves made their starting 5 better, as Holiday is certainly an upgrade, but they really took a hit on depth.

Gained Holiday and Porzingis, but lost Smart, Brogdan, G. Williams, R. Williams, and depth guys like Griffin and Muscala (added during season).

Hopefully the Bucks can take the Celtics come playoff time. I think our depth (barring injuries for both sides) might be the difference.