I don't really believe you're assessing him properly. Out of the NBA womb he's been bred to do nothing but distribute and make himself the 4th, at best, option. He's never had a reason to switch his mentality, while he's with a team capable of grabbing another ring there's no reason for him to change his game.
This season, when healthy, he's been the MVP of the league for maximizing that role. Virtually every PG and slasher hits a time and age in his career where settles down, plays reserved, settles for the baby j and lets things unfold. And quite honestly, like Steve Nash, I doubt he'll ever be put in a situation where he has to be a primary scorer. I'd compare him to an Avery Johnson, he had a very fulfilling career. I'm fully confident in Rondo. He's young and reckless. He'll come around. With the cap space he's going to see be freed up in front of him in the years to come it's pretty likely he'll more feast than famine. I don't think he's an idiot, he's bound to slow down, get under control and be more cerebral with age. Danny pulls off draft day miracles, when the time comes I'm not worried about cap space.
There'll never be a rebuild with Danny in town, he said he won't pull the Larry keep-him-around-til-he's-lost-trade-value on Paul, Ray and Kev, I believe him.