Gunslinger PvP is one of those awkward things. You're rarely recognized as MvP if you have the most damage, killing blows or objective points. A healer will win that 90% of the time, even if their extremely mediocre. Right now, Operatives and Scoundrels are probably more consistent across the board because they can solo a lot easier, stealth and have more CC.
The 50's only bracket will drastically change things. It was pretty unfair, me sitting at 16.5k hps in mostly Rakata PvE gear using 3 globals blow through level 15 Sith. Oh, IA Operatives do that to me too at 50? Damn...