I have a hard time judging someone who was obviously playing in a league above his head. There are numerous examples of players that were rushed into the league and playing over there head before they eventually caught up to speed, guys like Elias Lindholm, Teravainen, and even Brett Connolly are recent examples that come to mind. Of course shooting, passing, and decision making is going to hampered, the internal clock is still too slow, things are rushed, technique suffers, etc.
I have no idea what Tage is going to do, but trying to judge him based on last year is the equivalent of trying to figure out if this little kid is gonna be good at Basketball.