But Dragic never really ran a system. When he was on the floor in charge, they catered everything to him, letting him do what came natural to him. It was a lot like KJ's early years, and KJ never really ran a system either. (And Dragic never had KJ's 16-foot-jump shot or elevation)
He did. Just what you are describing is what he ended up doing mostly. Especially early on when he tried he sucked.
His few successes came when he did what he did, not what the Suns wanted him to do ideologically. That said, he continued to make progress, but never with the Suns became proficient in what we wanted him to do. So we both are correct. The Suns tried to get him to and he spent some significant time trying to run the Suns offense, but even as he slightly improved, other areas was where he found his success, and so more and more he played the Dragic way instead. By the end, he definitely was playing mostly the Dragic way.
But again, what he did on the court, doesn't mean he couldn't be a help on the practice court and in study sessions. I'm sure he knows what we want and in theory could help Marshall there.
Finally, the more I think about it, the more it doesn't matter, since I believe Marshall fits our system far better naturally than what Dragic ever did. Plus the pick and roll isn't very hard to learn. It's probably the simplest play to learn offensively. Again, I believe we need to focus on other areas now, so what I was initially basing my opinion on was a whimsical desire to help Marshall if there was nothing else out there. Definitely not at the expense of addressing other needs. But again, it's probably not even necessary given who Marshall is.