The devs have no interest in supporting/pushing PvP further as it will require more support and resources from their side, which they don't want to deal with. They can't even moderate it with the same 10 players playing it.
My biggest gripe is that you would think they would update the whole theme of PvP with the arrival of CC and removal of Feast, but here we are, stuck with all the Fold & Feast leftovers. It clearly shows their lack of interest in PvP.
I am currently waiting for 7.1 and my ultimate wish is for PvP to be competitive and rewarding, with higher skill expression/ceiling. I would love to keep playing this game and 7.1 is their last chance for me.