Yea, Commando/Mercenary is in desperate need of a buff while Marauder/Sentinel is over-preforming... as far as tech goes, Sniper/Gunslinger is in a good place damage wise (learning the protections will take a moment), and Powertech/Vanguard are also doing good (weird bias when it comes to melee in this game).
Big shame that the classes made to be a walking artillery platform got nerfed so hard...