I love the kid, a great pick for sure. I would even say that Fasth is on track to become a NHLer.
He is a very good skater. Think Ryan Callahan for example (more then say Sjöström/Kreider/Semin). He gets in real fast on the forecheck. Offensively, if he gets like a 2 on 1 or 3 on 2 he often can use his speed to his advantage and create a little more space then what most players can do.
Fasth isn't very big, but for his age he is actually pretty strong. He takes the body and is good defensively. He'll block shots et c.
With the puck, he has a lot of creativity. He is excellent at finding the trailing player and he can turn a D inside out. He has a decent shot too.
Think of a Swedish Ryan Callahan. I've not seen like offensive goto type of hockey from him. He he has a lot of offense in him, don't get me wrong, but he isn't the type who sets up at the far boards on the PP and bangs his stick against the ice to get the puck. He isn't a Bäckström type. He isn't a Alfredsson type. But he is extremely modern in his style. He works really really hard. He is a good skater. He goes hard to the net. But, in comparision with for example the past generation, he can do everything else, and does, on occasion.
Natrually he is still so young that the above can change. But thats how he projects now IMHO. I would personally rank him just below only our absolute top prospects (MZA, Kreider and Grachev up front). The kid is doing very well in the SEL.