Asked a journalist that follows Nyströms team Färjestad about him, and this is the answer I got:
Got some chances after injuries and played good, smart and calm for his age. The plan this year is for him to be one of six regular defensemen, and maybe he gets to play with Mikael Wikstrand, a pretty big signing for Färjestad this year (they are maybe the favorite to win the title this year). He also thinks Nyström is going to play for Sweden in WJC this winter, and he is playing with Sweden U20 right now in Plymouth. Says Nyström can improve in his own zone, "but that is pretty much everyone when the make the step from juniors to the big league".
That was some info, will be fun following him this year.