I have played more than a few games.
DAOC
Final Fantasy 11
WOW
AION
even a bit of EVE (Shudder)
And most of them except FF11 and EVE had the same problem.
You CAN NOT balance PVP using the same system as PVE.
You either do too much damage, have too much CC, or healers become godlike because they can out last you. Many if not the majority of all the class "Re-balancing" has been a result of PVP issues because the game is also using the same numbers for PVE.
If they had totally separated the systems for PVP and PVE then you could have some balance. But that is not the case.
Now you have classes that have been over nerfed and as a result they are dropping in popularity in both PVE and PVP. It is true that with exceptional playing and teamwork you can overcome these weaknesses on a case by case basis but other people playing classes that have avoided the big nerfs still can do better and with the same teamwork and exceptional play do better than a class that under performs.
I only wish a game could find the happy medium between PVP and PVE game mechanics so they could live together. But that is why it is called a dream and not reality.