Maybe i am alone on this since i can't remember someone talking about this before in the forums, or maybe i didn t pay attention.
I feel that AO's pvp is fairly complex. I would tend to think that a player can only master a few of the professions available, maybe 2 or 3, but having 3 fully twinked pvping toon @ 220 is a huge time sink (best gear available, plus eventually alternative setup gear to hotswap depending the opponent/situation/taste of the day, best tools in the inventory, grafts, usable ring, all this stuff).
Exemple : i play a NT, i am confident enough to say that i know exactly what gonna happens in 90% of the pvp situation in which my toon might be involved, especially when it come to 1 vs 1, and based on that i can extrapolate what gonna happens when i m facing 2 different profession, or 3, etc. But i have limited knowledge of how, say, a trader, will interact with a MA.
As a consequence i don't think feedbacks & ideas posted on forums should be taken seriously by the devs. What is posted might be honest, from time to time, beside the trollage/lobbying that happens most of the time, but this honest player might as well be ignorant of the global situation.
On top of that, FC is willing to modify a lot of core game mechanics. The deepest the mechanics is, the wider the consequences it might have on a given pvp scenario, the more complex it is to extrapolate what the end result will be - the final balance.
Problem is, i don't think dev play the game, and specially the pvp aspect of it, nearly enough to have an unbiased opinion of what really need to be balanced.
They should be able to roll any toon, at any level they want, with the level of gear they wish (regular PvM gear, twinked, hardcore twinked), trying the different setups player try emselves (full AR NT ? full evade NT ? nr2 ? etc).
I really don't think you can have it right without trying stuff in game.