If your in need of assists then i would do it. Marleau won't keep scoring 10 goals every 4 games or whatever. I think you got the best out of him while you have him. Sedin will definitely bump your assists up a lot, and Burrows should be able to rack up some goals, and get a fair amount of PIM, especially when Kesler comes back.
12 Team H2H 1-Year
C: Sidney Crosby, Henrik Sedin, Patrice Bergeron, David Krejci, Tyler Bozak
LW: Matt Duchene (C), Ryane Clowe (RW), Alex Tanguay, Jamie McGinn
RW: Patrick Sharp (C), Teemu Selanne, Justin Williams, Chris Neil, Ales Hemsky
D: P.K Subban, Brent Burns,
G: Carey Price, Braden Holtby, Ray Emery
IR: Mikka Kiprusoff, Gabriel Landeskog