This is an interesting situation that is nothing like Messier. From what I've heard, Mats is not very vocal, and is kind of a loner. I think here you have a quiet guy coming into a winning situation, where Messier was an asshole coming into a situation where losing soon became the trend.
Also, this is not a question of finding a place to put Mats. I think it is clear Mats will centre the #1 line beside at least one of Raymond and Wellwood. This does nothing to the 2nd line, except take more pressure off the Sedins, and allow them some time away from the other team's top pairing.
As much as I'd like to hate on this move, it makes so much sense. Furthermore, if the team does decide to go out and get another forward, it is clear he will slide in either beside the Sedins or beside Mats. Mats is a pro, and despite the Canucks being his #2 choice, I think he sees the fact that this is likely his last chance at a run. The pieces are there.