This is exactly why I'm advocating playing Mills more with the starters

When Kawhi and LMA are out there, the last thing I want is Parker dribbling around for 15 seconds. It's much more beneficial to have a lights out shooter who can demand attention from defenses and create space for Kawhi/Aldridge. If teams start to double those guys (which they'll almost certainly have to), then they can kick it out to Mills.
Kawhi has gotten to the point where he can create offense and run PnRs consistently. He's one of the most efficient PnR ball-handlers in the league. I don't think we need Parker to run offense at this point. Kawhi can run PnRs or attack defenders straight up off the dribble, Kawhi and LMA can create out of the post, Duncan-Aldridge high-low action...the list goes on.