Since this abuse is so often employed by the ignorance of the PvP savy who fail to see the big picture, PvP interest is now slim to none. Who wants to be stuck helpless in a battle? That's not fun, it's stupid and a waste of time. So let's explore other options. While locking is what keeps a lot of people away, it should not be completely done away with. I believe a "Combo Timer" should pop up when a lock begins giving a player a few seconds to really let their opponent have it. After the time is up, you go back to your corners.
Now to address the priest issue. "Valsu, if you break up a priest with another fighter they'll just heal." Healing should be prohibited as well in PvP. I believe a priest should not be completely robbed of their nature as a healer though. So I propose a passive regeneration of HP in battle this will of course heal surrounding party members as well. 3% HP every 8 seconds or something to that effect. This gives priests their birth rite as healers and keeps everyone else happy.
Now for those nasty AAS spammers. "Relaunch" should be banned from PvP. A few seconds could be all someone has when caught in AAS. So I believe an AAS counter should be installed on a countdown from 15-20 shots. Once shots are over, 0.5 seconds invincibility for the AAS victim. This again will promote a fair fight and give each fighter an equal chance at victory. If things were set up this way I can assure you it would draw a larger crowd to PvP arenas.
Other game elements should be introduced to balance the fight vs the stacked player. I have a few inventions in mind. "Buff Spheres" - Break the sphere for a buff, not an overly crazy buff but just buffs to make PvP more fun. More Aim, More INT, More STR, More ATK... you get the idea. "Escape Spheres" - These helpful critters will temporarily teleport you to a place where you can rebuff and refresh your cooldowns and then pop you back in the arena in a random location since it'll be timed. "Element Spheres" these guys will power up your damage and add effects to all your attacks. Ice Power, Fire Power, Poison Power, Earth Power, Et cetera.
I'm sure there are a lot of areas I missed but these few examples I am hoping you'll have the vision to work with me and other PvE players to try and make the server a little more interested in PvP. Constructive criticism is appreciated, please don't flame me as I am just trying to make the game more enjoyable for the PvP community by actually giving you the opponents you so desperately crave.
The picture below kinda spells out how most of the server sees PvP. Based on the many players I've spoken to.