Cartwright hasn't been terrible all year. He just showed he doesnt know what to do against a 1 3 1 zone even though he had over a week to prepare.
Remember when we had pgs like Monter Glasper, Chauncey Leslie, and Andre Woolridge who could break people down almost at will? Those were the days. We haven't had anybody like that in what seems like forever. Clemmons looks pretty quick in his tapes and should be a huge improvement from Cartwright. Not to mention he'll be a better defender as well.