His game is literally based on being invisible.
He’s going to be good positionally and wait for the perfect time to make a play, he’s played this way his whole career and as mentioned here many times, it’s the same way Toffoli has carved himself out a productive NHL career. Above average shot, above average passing, average skating, but high IQ/awareness.
Heineman doesn’t have the luxury of playing a cerebral game.
Roy needed NHL exposure at some point in order to expose what he needs to work on, mission accomplished. Now he needs to work on those things before camp next year if he wants to make the team.