100% the case.
Rutherford tried to play him in his rookie year and it was clear he wasn't ready, but in 18 games wasted, he burned his first year of his ELC and Sullivan barely played him when he took over. Then this year, his waiver eligibility gone, Sullivan never really gave him much rope to play through struggles like he did for countless others. Was barely given top 6 time, he clearly needs development in the AHL. But he's also a player that is skilled enough that you put him with like minded skilled players and let him play through it, he will do well. I hope he gets a spin with Henrique or Getzlaf, more so the latter as he has a wicked shot and Getz is a damn good playmaker that finds guys with a good shot in good spots to shoot.