His biggest issue at the NHL level is over-thinking everything. Whether that's a personal mental block, coaching, putting too high expectations on himself...
Every time he has the puck, or the puck/player is coming near him, you can literally see him stop and think about what he should do. That leaves you 2, 3 steps behind on every play - and he doesnt have the burners to catch up. He looked better during preseason, when he was away from the team and coaches for the offseason. When he was around the team/coaching staff more, he went back to the same, hesitant player. He's so tight when wearing a Rangers jersey, he makes himself a detriment on most shifts. But its a very fixable problem, hopefully. It's going to take maturity, time, and ice time - whether in the NHL or in Sweden. (I think we know the AHL route is not going to work for either side, at time point)