Let's face it, skills in combat doesn't matter for shit in PvP unless the involved players use builds that are perfectly balanced in power with one another. A random questing PvE build is never ever going to win against a optimized PvP build yet most players in BGs use their random PvE questing gear simply because they joined BGs as an afterthought to try and get that sweet daily bonus xp from random BG matches. 

I don't see why this shouldn't be the case either from players' perspective, I certainly know PvE players hate getting farmed by PvP players and proper PvP players probably get bored when never getting to face off other PvP players. Like matches certainly get boring when all you need to do is to sneeze in order to win, there's no adrenaline rushing action in that.

The only ones that would hate it are the "git gud" crowd that can only find enjoyment in crushing others that never had a fighting chance and then pretending that they're somehow better than you for simply playing with stronger shit. Like if they are as good as they claim to be they'd still dominate matches even after dropping their high sustain/damage and tanky DK/werewolf build in lieu for questing PvE builds.

Those same players will also complain about PvE players joining PvP with PvE builds when they'd actually hate for us to go in with optimized PvP set ups because then we'd no longer get farmed nearly as easily. The ant stomping would turn into evenly matched bar fights and they'd actually hate it.

So yeah, matchmaking should be based on build power level. Stuff like resistances, max attributes, sustain, gear sets, proper traits and enchantments with the right mythics and PvP skills on top of a ton of combat passives and food/drinks/pots matter. All of that should be brought into consideration when matchmaking players, someone with 17k HP should NEVER ÷encounter another player with 40-50k HP.

PvP matchmaking should be based on power score of characters