It's not just that he finally knows where he's supposed to go, he knows where everybody else goes as well. If you watch Leonard closely, you'll see him pointing out defensive assignments at times in transition, and he's generally right. He clears out when a post play gets called, he sets picks and back picks mostly when and where he's supposed to, and he generally doesn't fuck up the offense (which is all we really need from him on that end).
Leonard is really playing mistake-free basketball much of the time lately. I was quite shocked to see Robinson get minutes early in this game. At this point there's not much Trob does better than Meyers. Rebounding used to be his big calling card, but the way Meyers occupies space even when he doesn't get the board gives him the edge IMO. He's just so big and he does a good job of boxing people out--must be all that time watching Rolo.
I think he has a lot of potential to be a quality big in this league. I can see why we extended him. Somebody compared him to Travis Outlaw, and I don't find that comparison terribly fitting. Outlaw was never really coachable--they taught him to do the two dribble-jump-shoot move, and he never learned anything else. Leonard has learned how to position for rebounds, clear out of the way on offensive sets (while also diving in when the shot is about to go up), shoot three pointers, use verticality in man defense, help defense (without losing your own man)....he's actually proven quite teachable. He just had so much to learn to start with that you wondered how long it would take him to put it together, if indeed he ever would.
The question in my mind now is if he can continue to make progress at the same rate he has over this season, and for how much longer. I'd love to see him move beyond rotation player and into a guy who can challenge for Kaman's job (and ideally Rolo's job). You never know where a guy this young and raw has his ceiling.