I definitely thought of Olynyk when he started talking about how power forwards with range need to be able to pump fake, put the ball on the floor, and make plays for teammates.
Kelly has shown an ability to do that, what has been lacking so far is decisiveness and clarity of purpose when he's out there. Some nights he has it, and he looks great. Other nights he's tentative and seems to feel like he can't take an open shot unless it's the 3rd or 4th good look the team has had in that possession. When he plays that way, he's not much good.
I don't expect KO to ever be a great defensive player, or to ever dominate the boards. The plus minus numbers, though -- for whatever they are worth (I'm not sure) -- suggest he's not as much of a drag on the defensive end as the typical hot take on here would indicate.
I think that part of the reason for Kelly's frequent lack of "clarity of purpose" lies exactly in the fact that his role isn't as clear as many want to believe.
We want to shout along with Tommy "just shoot the ball, Kelly!!!" every time he touches the ball. I don't think, and have never thought, that this is what his sole purpose is, though. His job is to be a playmaker. Sometimes that means shooting, sometimes that means driving, sometimes that means looking for a cutter, sometimes it means getting it back to the guard up top who has a better opportunity to make a play.
Being a playmaker in the NBA is not an easy task to master. It takes more than just "shoot the ball," or
"go to the hole." It takes figuring out what is the best option on a given play and executing that play quickly and decisively and being able to improvise when things don't go as planned. That's a lot for a young player to master while learning how to play against the biggest, strongest, fastest, best athletes in the world.
You don't see a lot of "playmakers" attain mastery within their first couple of years in the NBA. It takes some time and practice to become comfortable with those kinds of decision making skills at that level.
I think Kelly will continue to get better at it. As many like to point out, "he probably is what he is." I agree with that, but think he has plenty of room to improve in the role of who he is.