Edvinsson is just a special talent, he might have some of the best tools of any defenseman drafted since Hedman. Not sure if he can put it all togehter, but that skating, size and vision is something else.
I'm hopeful that he eventually will put it all together, but even now at the age of 21 he looks like a top-4 D which is good enough at his draft position.
By just filling out his frame he'll improve his game, and he will most likely make less defensive mistakes with experience. Worst case we'll have a smooth skating 6'6" d-man in our top-4 and penality kill who can play 20-22 min a night.
Oh and i forgot to mention that he can manhandle guys