I personally think this game has potential for pvp. It has the skill based mechanics for it, with aiming, blocking, dodging and all, and it could be something like savage 2, if anyone's played that. It would require an overhaul, but i do have a few ideas.
Idea 1. Keep PVP and PVE separate.
I've seen a few people complaining that trying to balance pvp will unbalance the pve game. This somewhat simple idea will change that. Once you enter a pvp zone (arena, lobster barfight), your skills and feats change so that they are balanced for pvp. Once you leave that area, your abilities go back into pve mode, allowing turbine to keep pvp and pve balance separate.
Idea 2. Emphasize skill.
Probably the most major change for pvp that i'd like to see would be removal of all luck. When you attack a player, no d20 will be rolled, your weapon will deal a set amount of damage, and it will only miss if someone blocks at the just the right time or dodges. Blocking would reduce damage dependant on the time between the attack and when the block started. If you block very quickly, you will negate all damage. If you held block for a bit more time, you take a reduced amount of damage. Also, i'd like to see the removal of influence of gear. Different classes of weapons will do different amounts of damage and attack speeds, like a falchion won't do as much damage as a greatsword, but will attack faster. But no matter what enhancements you have on your weapon, they will do the same as a basic class of that weapon. Also, when you enter this pvp mode, you automatically get the same stats as others for your class of your level, your gear not influencing you, though the feats will still take effect, allowing for some measure of customisation.
I'd like to see what you guys think. Please give constructive criticism on this, saying what you think could be improved.