The Sedins have always have excellent strength on their skates, making them a hassle to play against along the boards. Their power game has always been massively underrated.
Nicklas Backstrom weighs 210 lbs. He is heavy enough on his skates to push through traffic.
One can't rule out an eventual increase to a sufficient level of strength in the NHL for Pettersson. Kyle Turris and Ryan Nugent-Hopkins both took several years to mature into 190-lb players with sufficient balance on their skates not to be impeded as easily by the opposition.
Pettersson either needs to become quicker or much stronger, though, than he currently is. He struggles in traffic, and one off-season might not be enough for him to completely overcome this issue. The NHL opposition closes in so quickly on the puck carrier and on loose pucks that he'll be in traffic much more than he has ever been in his hockey career.
I'm not entirely sure he will be ready for the NHL next season.
I love this prospect! But I am certain you are correct about your central idea here. Except, I think he has the tools and can move well... (minus the lower body strength). Instead of skating at the speed he is capable of skating, I think he is actually choosing to slow down and use all the space around him to pass into, shoot, or play in. He will not have the same space small ice in either the AHL or NHL.
A poster indirectly mocked assessments like these that were being made while EP was at the WJC's; but he needs to move/explode, drive even, to create angles and attack space differently, rather than passively standing, looking, and finding space to pass into. He will need to learn to create the choices/angles to play from because they will not be there for him over here. And sometimes, that means fighting through people and winning control of space physically. He does not have the strength NOR the mentality just yet. But he has the decision making skills and the technique to impose himself once he changes the mentality.
It will take time for his body to mature, but I am convinced he can use his skills and smarts to develop the new strategies once his body developed the required strength and balance.
I just believe he is going to have to do it in the AHL for at least part of the season next year (or any year he finally chooses to come over- as he might instinctively know this and choose to stay in Sweden for another year).
When he was drafted, so many people commenting on him suggested he was really talented, but that he would need even more time than usual to make the jump. After watching him so many times now, I think it is clear where these comments were coming from.
I guess, who knows what one off season can do, but I take it slightly further than you "Blade Paradigm" and think it would be best for him to spend a year (or most of one) in the AHL figuring this out and continuing to get stronger while changing his attacking mentality.