I think the short heal cooldown on the Mass is more important than the secondaries. I have found it allows me to get in closer and stay there longer than any other battleship, provided I dont mess up my positioning. I do run the risk of burning through all the heals quickly and getting sunk but I have found that I can slow an enemy push long enough for my team on the other flank to break through and either kill everything or hold caps long enough to secure a points win.
Statistically speaking though, I am better in Alabama. Sample size could be bigger for both ships though so take it for what its worth.