Yep, smart hire. I think Corbin has had enough experience as an assistant to be able to run his own ship, but they lost what, 40-50 combined years of experience with Jerry and Phil leaving. Can't hurt getting some back on the sidelines, especially when the other known assistant Hornacek is still new.
Malone would be good for Favors, dunno about Kanter. At the very least he'd teach them something about having a work ethic.