Ideal is more like 5M actually these days IMO.
I get your view point, but Edmonton is also not the one who is up against the wall. NY was dealing from a strong position in the off-season, that has changed.
RNH still has some chance of breaking out offensively as well, but that will probably depend on having a real scoring threat on his right wing (goal scorer), and not having to play a shutdown role. His PPG is not going to be as good when hes not being given the offensive starts and matchups as well. Personally I think he's doing fine, and you can see that Edmonton fans are happy with him.
I do still believe Hamonic/RNH/Barrie can work for all teams involved though. All of them are 2nd pairing/2nd line types, but very high end for their role, and it fits pretty well with all three teams needs.