Look. Pvp wont be balanced until FC start reducing Unbalacing 3rd party elements.
1) OE'ing <-- Which is having a look at
2) CRIT BUFFS <---- Major issue
3) Nano resist and its effectiveness.
Now, if we had 2 players the same level, no crit buffs on either, and resistable debuffs and roots, it'd go a long way in seeing just who is uber and who isn't.
I'd suggest that in essence there really isnt that much in it - And it's these 3 main things which benefit certain classes over others which create this obvious imbalance.