I don't think so. Here's his spray chart this year:
He seems to be getting to the net enough for my liking, especially compared to some others on the team, but the pucks just aren't going in for him personally or for his teammates while he's on the ice (Lars Eller has similarly poor on ice numbers this year, for example).
I suppose Panik could just be a bad shooter, but in that case I think it would have been apparent in other years. Yet in other years he has typically outpaced his ixG (he's a career 0.77 iG/60 compared to 0.75 ixG/60, and last year alone he outpaced his ixG/60). This year he is only scoring 0.45 iG/60 against 0.65 ixG/60 (the 0.65 ixG number differs from the 0.57 ixG/60 number in the above spray chart because Evolving Hockey and HockeyViz use different calculations for expected goals).
I suppose also that maybe there's something about Laviolette's system that doesn't mesh well with Panik's style in terms of shooting, but I haven't really seen anything to indicate that. I think the more likely explanation is just that he and his line have been unlucky offensively.
What's even more curious is that his on-ice save percentage is in the toilet when this is where the shots are coming from when he's on the ice:
I think he and his line have been particularly unlucky on the defensive side, where Panik has the 18th worst on-ice save % of any regular forward in the NHL (out of 343 qualified players) despite the shot chart shown above.
I would bet on these averages reverting to more normal numbers sometime soon if and when he gets another crack in the lineup, and at that point I think his contributions will be more easily noticed.