I'm not saying he will be Trey(although to be fair I posed the question earlier if he'd be Trey 2.0), but I'm saying he will have very similar issues with finishing in the lane and around the rim. That's almost a certainty. His success would depend heavily on his ability to knock down shots. And he hasn't shown an ability in college better than what Trey was showing in a better conference against much better competition and on a much bigger stage.
I personally would rather pick Jamal Murray or Kris Dunn next year than Payne this year. I'd give Trey one more year to see what he can do and if he can improve. If he still sucks... prepare for letting him go and either pick up a vet or pick one of the two I mentioned.
There haven't been that many great PG prospects of late. FWIW, Payne looks a lot better than Tyler Ennis who went 18 last year. He's probably better than Trey, he's more naturally talented, but the question is how much? And then the question is whether he can play off the ball.
I think the most impact the Jazz can make this year would be to take Turner or Looney. Particularly Looney could have a big impact even if he pans out just a little bit.