Right now, DeRozan and Aldridge have the 2nd and 3rd worst marks in terms of on/off numbers in the entire team with -14.2 and -13.6 respectively, behind only everyone's favourite player: Dante Cunningham at -14.7.
That's by far the worst mark of any set of "star players" in any team. Go look at the numbers of the stars of any sub performing team and you would see this is true. Just as an example: KAT and Wiggings, even with how much these two get scoffed for being inefficient and with how much the Wolves suck, still manage to post positive impact numbers. Carmelo Anthony, of all people, still had a slightly lesser worse on/off metric than DeRozan and Aldridge when he got cut by the Rockets.
This obviously doesn't mean DeRozan and Aldridge are the 2nd and 3rd worst players in the team or that they are worse players than Carmelo Anthony, of course. But it does mean that they don't need to hog as much game as they are doing right now for the Spurs to win.
In my ideal World they would get traded for more efficient players but as I know that won't happen my second best scenario is that they stop having such prominent roles to allow for the rest of the players in the roster (mainly Bertans, Poeltl and White) to grow.
Before the recent streak of blowout games, DeRozan and Aldridge were both among the leaders in terms of minutes played per game and usage, and numbers suggest that there's really no reason for that.
At this point of the season one can honestly argue that the Spurs would be better off with Poeltl out there instead of Aldridge, so cutting LA's minutes to give Jakob more burn is one of the most obvious adjustments to make. Pop has hinted recently to some of that but I would like to see it even more marked. My dream scenario would be giving 24 minutes to each, but I would be fine with 28 for Aldridge and 20 for Poeltl so that the big cry baby doesn't completely check out.
DeRozan is a little different, I can live with him playing around 32 minutes per game as long as he is playing more as a distributor and doesn't try to force his own inefficient midrange jumpers while the rest of the folks just watch.