It isn't that this is a trend that has been there since the game launched. I remember the first few weeks wasn't swamped with inquisitors in pvp. But now its all there is.
The 1v1 argument doesn't work in pvp because there isnt a 1v1 in pvp.
With all their movement abilities if you're in any kind of environmental hazard situation you're nearly guaranteed to lose the fight, ESPECIALLY if you're a mara.