This keys for me are that this team is:
1)Versatile (and deep). It can go big, it can go small, it can go everything inbetween. We're not talented and well constructed enough to force most teams to play our preferred way*, but we can matchup with pretty much anybody while having a good lineup out there. I mean, I remember times when out "go small" move was Travis Outlaw at the 4.
2)(Potentially) well coached. In his last Denver stint Karl crafted a top 5 offense with a team with minimal (by today's standards) amounts of shooting. Defense was good too, and one could argue that we have superior defensive personnel. It has to be seen whether Karl can replicate that kind of success at a slower pace.
Rondo has of course to be reasonably close to Celtics Rondo (i.e. gets to the line at a decent rate and hits his free throws), but this team has the talent and the depth to reach 50 wins. As a board, we were convinced that Cousins alone with less defense, less shooting and less playmaking to surround him was good enough to sustain .500 ball before the FO threw it all in a dump. The potential for disaster is there as always, since two major unknowns (Rondo and Karl) have to break right, but the ceiling is way higher than it's been in the last decade and some.
* Which is still a mistery at this point. It will either be extremely big (Gay-Cousins-Koufos) or extremely small (McLemore/Belinelli-Gay-Cousins).