Very interesting and valid points from everyone. But everyone seems to be speaking from an offensive perspective. Yes, those offensive droughts that were so painful to watch will occur less often. JET and Green will anchor the bench. But how about rebounding? I have a hard time imagining us raising banner 18 if we remain the league's worst rebounding team.
Two potential solutions: 1. the non-KG plus-rebounding big men on our roster (Sullinger, Wilcox, maybe another big man addition) play well enough to crack the rotation. 2. We gain such a tremendous offensive benefit from playing small, fast and loose, that crappy rebounding doesn't derail our offensive firepower.
If the latter sounds far fetched, consider the example of the 05/06 Suns (one of my favorite teams to watch ever). Despite ranking worst in the league in ORB%, they still fielded a top-2 offense, thanks to the open-court wizardry of Steve Nash, a corps of elite shooters (including Nash, Bell, Barbosa, Tim Thomas and Eddie House) and some high quality complementary scorers/playmakers in Marion (open-court finisher/mismatch for other 4s), Barbosa (dynamic combo guard) and Diaw (jack-of-all-trades).
This C's team doesn't have quite that firepower, but it could be in the general ballpark - open-court wizard in Rondo, a smaller but still potent stable of elite shooters (Terry, Lee, Pierce and maybe Bradley if he picks up where he left off before the injuries), a sort of quasi-Marion offensively in Jeff Green, a Barbosa-type bench scorer in Terry, and a Diaw-like jack-of-all-trades in Pierce. And of course KG.
The big difference offensively, of course, is Rondo's lack of range/efficiency, and the Celtic's reliance on the 18-footer instead of the 3 from their big positions.