I voted average starter and okay pick mostly because he is showing some legit ability to keep guys in front of him and a very impressive defensive bball IQ. If you can defend, it's a lot easier for a coach to keep you on the floor. I wouldn't be shocked if he became an above average starter, nor would I be shocked if he were considered a bust based on his draft slot. He's so young it's just really hard to predict.
For those who are old enough to remember, my optimistic view sees him becoming something like Chicago Bulls version of Ron Harper. Big PG, not really dynamic or explosive athletically, not a great shooter, but respectable, very good defensively and while not a great playmaker with huge assist numbers, can get the ball to people and take care of the ball. His size at the PG spot will always be a major advantage. And hey, if he can be lucky enough to play with the 2020s version of MJ, he may win multiple titles!