Chad Ford has him at #19. So it's not a reach and you couldn't trade down too far for fear of missing out.
My point is, there's no way he'd be projected for that part of the draft if he were as talented as your comparison would suggest.
He'll probably be a bench role player. An energy 4/5 who can stretch the floor a bit.
Most teams can use a player like that, but with Sullinger and Olynyk already on the roster, I think the Celtics can get more value with the 17th pick.
Payne went at #15 to the Hawks. You could very well be right that Payne may end up a bench role player. I think he looks like the Junkyard Dog with a three-point shot.
In any event, my projection for Payne to go at this part of the draft was spot on (15 instead of 17). My comparison may or may not be accurate for the type of player he will be, but the idea that he shouldn't be selected until after #17 proved to be wrong.