Technically of Vasilevsky/Fleury/Price/Hellebuyck, one could argue that Fleury is the most athletic, Price is the most technically sound, Vasilevsky has the highest IQ, and Hellebuyck has the most well-rounded overall package but not high in any of the categories that make the other three elite. That being said, taking any one of them with a first round pick doesn't mean you've drafted an inferior goalie. That's how I view Wallstedt. He may not be the most athletic, but if his technical skill and IQ are superior...you grab him and run away giggling because you've drafted a #1 goalie.
This is why goalies drive people crazy.
You can't just take the best athlete and expect them to produce, as you might a forward. So much more of the game is decision making and between the ears for goalies.
So when you're drafting a 17/18 year old netminder, it's not a bad idea to get a solid read on the kind of kid they are. Their temperament and how they handle adversity. Their training and consistency with the rigors of a routine.
I've said many times Askarov has all the raw tools to make him an elite puck stopper, but that doesn't mean he'll end up the best overall of this new wave of great goalies. Wallstedt has that poise and calm to his game that elicits comparisons to Lundqvist, Swedish connection notwithstanding. His actual technique borrows a lot from the Lundqvist playbook, specifically where they take shots from the crease.
There are times scouts will overthink development and deem a prospect already fully baked at 18 with less room to grow. Usually this happens when all their metrics look NHL ready but they don't immediately slot into a roster position.
For us Wings fans, I think the most memorable example of this was being told Chychrun didn't have anymore ceiling. He was good now, but he's done baking. Meanwhile, Cholowski was just waiting to grow, become strong, and have so much potential. Fast forward to today and it's pretty clear maybe the kid who looked like an NHL player right away was the better prospect.
This is my round about way of saying if people think Wallstedt doesn't have as much potential left... Good. I don't see a single reason he can't be an NHL starter in a few short years. No need to drag out his development to age 27 wondering if he'll put it together ala Markstrom.