Honestly, as someone who doesn't/didn't love Domi's game even prior to being here, I think he has potential to take another step here. I don't think he will necessarily be as good as his one MTL season where he scored 70 points, but I think he can be a high end 2nd line scoring winger for us. He seems to really enjoy being here too, which is always nice to see.
Also important to remember, Domi is only 26 years old. He's been around forever, and I think that means people think he's older than he is, but he is right in prime age. It's only one game, so trying to get a hold of myself, but if he has a good season (on pace for 50ish+ points) I would try to keep him. At most you're getting some picks for him, and we have plenty of opportunities to get those with other older UFA's to be down the line (Nyquist, potentially Laine (although I hope not), Kukan, Korpi, etc).
If he does all these things I would have no issue giving Domi a 5-6 year contract at around 7-7.5 mill. He brings a dimension that we don't have much of (high end skill and playmaking). Voracek is up there in age, and you can never have too many playmakers.