Those are all tall scoring forwards Destino. They have a different role than Wall. I think Wall can be the PG version of them because he's got absurdly good physical tools for the position. 6'9 reach with god given speed and explosiveness. The first step and agility and top end speed with natural handles has to be the finest collection of such traits in the league. This is something that was really hammered home to me watching the rising stars game. The whole game was a track meet full or springy, explosive young athletes like Kemba Walker, Blake Griffin, and Paul George and John was clearly the fastest and springiest of them all and it didn't seem close.
The turnovers and perimeter defense actually worry me more than the shooting does. But I expect all three of those to improve dramatically as he ages and gains experience.
Shooting comes to most NBA players in time. The turnovers should decrease as he gains experience, especially as the team play around him (hopefully) improves.
Someone pointed this out the other day in an article I read, and I think it makes a good point for thinking about Wall: LeBron James was considered a terrible perimeter defender his first few years in the league and now he's transformed himself into one of the premier defenders in the NBA.
With his length and speed, Wall can get there too, and he's already shown a real penchant for getting into passing lanes and getting steals in transition, defending 2 and 3 on ones (and sometimes more) in transition, getting strip steals and then exploding up court for momentum changing buckets, recovering after getting beat initially and then catching his man at the rim and blocking shots, etc.
He does some truly spectacular things on the defensive end from time to time that suggest he can become a holistic, impact defender in time. If you're like me and grew up watching Stockton and Payton as the epitome of great PG play/defense, the kind of stuff that Wall can do at the rim is downright amazing. I've never really seen anything quite like it at the PG position.