If I'm Gillis - I look at a guy like Moulson and ask if he's better than what I already have, especially considering what I would have to give up. He's had back to back 30 goal seasons playing 1st unit PP - Raymond had 25 2 seasons ago playing 2nd unit PP, Sammy had 30 playing 1st and 2nd unit PP. Higgins has had multiple 20 goal seasons and should be good for at least 15, and you've also got Sturm (7 20 goal seasons) and Hansen who should improve, though he almost surely won't get close to 30 I expect 10 to maybe 15.
That's 5 wingers for the 2nd/3rd/4th lines, all who are already on the team and who could come close to Moulson's production in a career season. They aren't sure things by any means, but they are solid players who are very good PKers as well, and this doesn't include Daniel or Burr, who should score 35-40 and 25-30 respectively.
My point? Like Tant, I just don't see Moulson making that much of a difference, and especially not for Hodgson + Ballard. That makes the team worse, IMHO. If a new winger is brought in, he will be a physical player who goes to the net and can pot the odd goal - again, somebody like Brenden Morrow, who brings something different than what's already available. There's no use in bringing in more of what you already have, or a slightly better version of what you have and giving up a lot for it.