WTF? I posted a detailed reply to this, and it didn't save.
The gist was that even in Jimmer's highlights, he shows he's a poor spot-up shooter. Some of his attempts are 30-plus feet from the basket, and his release is letting guys contest his shot when they start from the paint or corner. Him having such a poor impact on offense statistically backs that up.
He's better with the ball than people give him credit for, and that makes him a decent one-on-one scorer. But if he's going to be a spot-up guy in the Spurs' system, he faces an uphill battle. At best, he could be Beli 2.0, but that undersells Marco's other offensive attributes. Jimmer will need the ball in his hands to generate the looks he's famous for (and isn't the cutter Marco is), and I don't see that happening in a normal Spurs game.