It's hard to tell if the Bruins have interest in upgrading their center spot at the moment. Poitras seems to be in the future plans and the play of their center by committee has payed off more than I think even they were expecting. Coyle and Zacha have been all situation workhorses and Freddy/Geekie have been plug and play centers when needed and have played well.
Personally, I'd prefer to keep Poitras, but if WiFi was included as the + and the Bruins were able to extend Monahan for a couple more years at cheap-ish money, I'd be for it.
JVR -- Zacha -- Pasta
Marchand -- Coyle -- DeBrusk
Freddy -- Monahan -- Geekie
Heinen -- Boqvist -- XXXX
Get a hard hitting grinding RW with some size for the 4th line and I think that's a deep group of forwards heading into the playoffs.