I ask that you objectively watch this video. Please. Watch it, then we can discuss.
Donovan Mitchell attacks the painted area, and on almost every single finish in the lane, he is past his guy but has to deal with either Rudy's defender or Whiteside's defender. And before somebody makes a comment, he's not getting past his opponent using Rudy's screen every time. Don is simply blowing by his man sometimes.
If we had a system with bigs who could shoot, Don's finishing or his assist rate would go up substantially. When he gets to the paint, which he does and will, the opponent either gives up the outside shot or the layup.
Don has some amazing assists in this video for the slip screener. House and Royce both get the pass and dribble in for the finish. Rudy can't get the ball that high and dribble in. For as good a screen as Rudy sets, his pace towards the rim and Don's is just different. Players have styles and strengths. Don isn't a PG, but he can facilitate a bunch for a SG. A player like Trae plays in a way that feeds Rudy more. It's a style thing not a selfish thing.
Don doesn't play in a way that gets the best out of Rudy and Rudy doesn't have the skill set to play the way to get the best out of Don the facilitator.
View: https://www.youtube.com/watch?v=MqlrCkUX6ZQ