I was and am concerned that Garrison might be a one hit wonder, but it's still very early and he'll probably need a bit more time to get really comfortable. If we dont see any flashes of what made him successful last year soon, then maybe we can start worrying.
What was most concerning to me about his career season last year was how few assists he had. Sure he had 16 goals but maybe (not very likely) he was just getting lucky, hammering the puck, hoping for the best, and it worked 16 times. I hope very much that I'm wrong though.