I like him a lot there. His biggest weakness (imo) as a player is his inability to be a playmaker at the PG position. Put him off-ball and all of a sudden his hustle/defense and solid defense are a lot more on display. And of course he's an extra good ball-handler on the floor.
This is on Karl tbh. Isn't a single good match-up between Miller guarding Rivers, Williams on Crawford and Casspi on Reddick. Got to get a lineup in there that at least has a chance of defending them