I'm repeating myself here - Lord knows, we wouldn't want that! - but for me the issue with Domi is a longer-range one. He is quite obviously a go-to option at C for the current group, but there seem to be structural problems in his game at centre: bad at FOs, not great in his own end. But moving him to wing is not really an option, given that his production there is consistently mediocre.
Now a contending team might be able to carry a C like as a #2 behind a real strong, stud #1C. But unless KoKo or Suzuki has it in them to be that stud #1, we will probably need a less flawed #2C if we ever want to vault ourselves into the ranks of the top teams.
So I see Domi as a transitional C. Or at least, that's what he would be if the Habs ever become more than mediocre themselves. He's one of these players who is tailor-made to excel on relatively weak teams, but will tend to get crowded out on a really strong one.
This doesn't mean we should get rid of him in the short term. Not at all. And who knows, maybe he will learn to fix those weaknesses in his game. I'm just saying that I don't see him as part of a medium-term plan to contend.