I'd also hang onto Moulson unless you get an offer that blows your doors off. I had him a few years ago when he first came on the scene on Long Island and dropped him at season's end thinking he was more flash in the pan in order to protect someone else who I can't even remember and may well not even be on my team anymore. Not a week passes where I don't think about that decision at least once as I see him filling the stat sheet (even moreso when he does it against my team in a head-to-head matchup, which seems to happen regularly).
As others have said, having a near (if not completely) permanent grip to riding shotgun with an elite player is a nice place to be. Mouslon ain't sexy and he may very well be leeching off of Tavares' unreal talent to an extent, but he's the kind of player whose cost-to-acquire vs. production ratio wins you championships.
14 Team H2H Dynasty League (14 keepers, 21-man roster, no farm)
G, A, PPP, SOG, BS, +/-, GAA, W, SV%