I may be jumping the gun a bit on this as the playoff seedings are not set yet, but BOS is #1 and will have home court throughout, that much we know. Our first round opponent could be IND, ORL, PHI, MIA, ATL or CHI, I believe. And the rest of the bracket could be pretty much anything still at this point.
With the signing of Queta, we now have the playoff roster. Two-ways are out, so we are down to this:
Guards: Holiday, White, Pritchard, Mykhailiuk, Springer
Wings: Tatum, Brown, Hauser, Brissett, Walsh
Bigs: Porzingis, Horford, Kornet, Tillman, Queta
That is the full 15 man roster, 5 in each category, pretty good balance. I highlighted the expected "core 8" who will play regularly in the playoffs. I expect that Kornet, Tillman, and maybe even Queta will all play some, kind of a third big by committee.
The weakness I see is the depth with the bigs. We can't play both Horford and Porzingis at the same time very much or you will use up their minutes and have to play Kornet/Tillman/Queta (or go really small). We play small, with an extra guard, and at times, we get victimized on the offensive boards. One extra possession, due to an opponent's offensive rebound, can be a difference in a playoff game.
But we come out of the regular season as the best team and the favorite to win the title. We are largely healthy, 1-15. What more can you ask for.