It's the Quin effect. DMC was a high intensity player but he had no range and was just an average defender. He took a lot of chances on defense. Snyder molded him into not only a starter, but a very good one. Would DMC have developed on defense and as a shooter under Ty? I doubt it.
DeMarr was in Atlanta for 2013 season. Quin became head coach for Jazz in June 2014.