Playing since BC I must say, I've never seen it this bad. Can't talk about Vanilla as I did not play it. Even at it's worst, it usually was everyone killing everyone very quickly. Now we have a similar situation as that, except some classes are also approaching semi immortality while doing so.
Now the whole "WORLD PVP DUN MATTIR!!!111oneoneelven" crowd will flock in and scream it's never fair. Sure thing but there is a difference between several people ganging up on one person, of someone killing low level people or freshly dinged chars and certain classes being effectively demi gods who can roll around laughing and spitting with their one shot macros.
The worst about this is, that they heavily promoted World PvP in this expansion. With the Underbelly and the FFA zones. What is the point of those, if everyone is effectively just quest mobs for a selected few classes?
I've seen glaive rogues, I've seen smourne warriors with pet heals, I've seen five stacks taste for blood warriors on shotting people but at least those had to build up the stacks first.