There are truthes to the Ranged classes being overpowered
In all games, the first step to do while balancing classes for PvP, is that you look for Ranged/Melee.
-The reason for this is; Because Melee have an obvious disadvantage. This in turn is rewarded with somewhat better scaling on weapons, or higher base stats, so that when you finally do get a few hits in they will actually count for something.
The problem with SWTOR right now, as for as PvP goes, is that not only do Ranged Classes deal the same amount of damage at any given moment/situation, they actually do MORE straight up burst damage, AND sustained damage than any of the current Melee classes.
There is Currently no real reason or benefit from rolling a Melee class if you want to PvP at a high level. (look and preferences aside)
I'm not just another random QQ'er, i actually know what i'm talking about, from being a top tier player in both WoW and League of legends, along with moderating several gaming communities where i have had the pleasure of speaking with designers and what not.
Below is a picture showing how, in truth, it does not matter how well your team is playing in a game of Huttball, for example, if the enemy team has several Mercenaries.
http://imageshack.us/photo/my-images/834/dumbr.png/
To be frank, even I could have done a better and more thorough job of balancing the current classes in SWTOR.
Ps. It is by the way certainly not true that Melee's do not top the charts in games, in fact they often do, but currently it does not actually matter all that much how good you are at playing your class, unfortunatly.