PVP players were never taken seriously by the devs, even when it was a lot more active (tbc-wolk). Over time people get fed up with imbalance. Now with the ability nerf, pvp is even more linear and boring. If opponent does x, you do y. There is no choice, and very little option in how to react to a situation. It's a lot like fighting a dragon now, everything seems scripted and predictable. That's why most people don't bother with pvp now.