Kyrie + LeBron + K-Love is an amazingly good trio.
Those guys are going to be insanely difficult to defend.
Celtics seem to be one of the few teams in the league that actually have the roster make-up to be able to defend this type of team.
But yeah.
I get Rondo/AB/Smart being able to defend Kyrie and Green/Bass/Wallace able to effect Bron's game as much as it can be effected but I'm not seeing how Love is stopped. AV either for that matter. AV would kill the C's when they still had KG and Perk. Zeller/KO/Sully/Fav/Anthony are not near KG/Perk's level on D.
Sullinger match-ups quite favorably against Love. So... don't see how that's hard to envision. As for Varejao, from a defensive perspective, I Zeller/KO shouldn't have much problems with him.
So yes, it's a talented team that will be hard to guard, but the Celtics are very well equipped to do so.
It was the same thing with the Heat these past seasons. When we were healthy, as opposed to the rest of the league, we match-uped very well against them. Doesn't mean we were a lock to beat them or anything like that, but from a match-up perspective, particularly defensively, our team was well prepared for that challenge.