Well, if you are asking whether Rondo can single-handedly carry a team to a higher stratosphere, I would say no.
He isn't a scoring PG, so, he'll need dependable guys (not saying he needs superstars) at the very least to set them up.
For sure, without KG and Paul, Rondo would wrestle more of the scoring load, but still, look at the fact. Everybody is more or less agreeing that 35-year-old Paul shouldn't be our constant primary scoring weapon (again, not saying he shouldn't be our go-to player, but you cannot constantly leave the load to his shoulders), but a secondary option at this point, yet, Rondo didn't step up to push Paul into that position by any means.
Whether this is what Doc, or Paul, or Rondo wants, I don't really find it important. The thing is Rondo hasn't showed anything to suggest he can score 25 night in and night out in this league and without doing that, you cannot single-handedly carry a team to a completely new level.