This invincible shield that these classes when their health gets below a certain % lasts way too long in pvp. I don't care that they have that ability but it lasts too long and it needs a nerf. It is bad enough they can also stealth in mid combat (which is also unfair) and have multiple stun moves. This class is over populating the pvp games and because so many people now play this class we don't see as many healers or tanks in pvp it is all just melee dps. It is ruining the team aspect of pvp when nearly 90% of the server population that pvps rolls a maruader type class. I have pvp'd every single day for the past week and been hard pressed to get lucky enough to end up on a team where it wasn't all dps melee chars.
It's not really that overpowered at least not more OP then a RET pally with Bubble in PVP. The problem however is that some of the other classes are a little lackluster at certain points. I'd still say that Sorcs are still one of the better classes for PVP since slows and nuking at range is so effective since someone at Bioware thought it was a good idea to just give classes 5 billions of slows, stuns and whatnot instead of making PVP highly skillbased where you maybe had 1 cc and had to really learn how to use it in the correct situation.
AS it is now you can just spam CC around like a baws. The resolve meter you say? Ye that is great until it goes down and everyone who have waited with their CC until your meter is not filled anymore starts CCing you again.
In essence SWTOR PVP is just a stun fest, and between the stunfest is where the more fun parts of SWTOR PVP is. WHy they felt the need to give classes 5 billions hard CC is above me TBH.