Laf has best-of-breed hand eye coordination, with natural instincts, in short he is naturally talented on a level that no amount of training can reach. He needs more leg strength, get comfortable with the NHL 200-foot game and play on a line that suits his game. Laf is "suffering" now partly because the Rangers have all the setup guys and playmakers playing on the same line (PSK). He is not a 'burner' that creates his own space so he will need help from his linemates to do that.
At this stage I'm not looking for "flashy skills" (I know many are) I'm looking for more involvement, chasing pucks down, takeaways, fast transitions, intensity, hard work and good puck management. I'm not worried at all, Gallant saw the issue and put him on the right track.