I don't think you can say this year's team really has any type of "system." We've scrapped the UCLA shuffle-cut that we could always get layups or open jumpshots on the weakside out of, we can't run much screen-roll when Jefferson's in the game, we can't run our cross-screen action that gets us layups and deep post position because Al can't catch&score on the move, and the flex sets we do run are so basic if you stop the initial backscreen (usually 2 screening for 3) you shut it down.
Now w/our 2nd-unit, we've seen moments of brilliance w/Hayward&Burks in screenroll, we've seen Kanter score efficiently on the block, we've seen Favors become probably our best low-post passer (seriously, he may not have great moves in the post but the few times he gets it - people cut hard and he'll find them) but mainly the 2nd-unit hustles and plays defense where they can get out, get some good looks in transition and cut&pass with some sense of purpose ... but again, we're talking 15-20 minute stretches and not 35-40 where we resemble a cohesive unit.
I would love to see more Favors&Kanter in our traditional cross-screen action, with a wing (DeMarre?) sticking the big and getting them point-blank looks beneath the basket. I think Hayward&Burks would be great running through our UCLA sets...remember in the game down in Orlando Hayward got 2 layups off the standard UCLA shuffle cut and Harpring pointed out he hasn't seen that all year (and we haven't really seen it since). Right now our 2nd-unit is great because they play hard, are willing to pass, play defense and have significantly more athletic ability than the starters. Give them a system worth a darn that can make their individual jobs easier and I really don't think "Playoffs" and "Core-4" are as mutually exclusive as the Jazz make it out to be.
My post summed up in 1/10 the space. Repped, GB.