Heavy Weapons:
Winding Argument - Damage is horrible in pvp, you will hurt yourself more than the enemy, used to be used to mark stealthers
Ionic Shotgun Cannon - Damage is ok if you don't miss, High rate of fire, consumes 2 ammo instead of 1, always reloading (meh)
Equilibrium of Forces - Doesn't register right
Devourer - Amazing damage, hard to aim, sometimes (quiet often) you have full lock and it misses
Moon Striker - aoe in pvp is bad, and this weapon is probably the worst of them
MIRL-600 Warhammer - https://www.youtube.com/watch?v=-3181HLCwio
Summer Leech - Freezers feel really bad in pvp
Ravager - doesn't register right
Cursed Soul - Damage is good, sometimes blobs fly off weird, probably best hc weapon atm
Malediction - aoe is bad in pvp, unless you are trying to blind the enemy stay away from this
Doom Beamer - aoe is bad in pvp, enough said
Creed - doesn't register right

Melee: (note - Damage has seemed to have been lowered across the board,first pointed out by brendan murph, seems they were)
Paw of Tiger - Don't see melee PEs, no comment
Perforator - Knuckles are horrible..
Peacemaker - Used to be the monk killer, seems to have been gutted, horrible damage, poor rate of fire
Vein Ripper - Never see, no comment
Blade of Ceres - Not too bad, used to be great, amazing range
Soligen's Finest - Never see, seems weak on damage
The Dentists - Knuckles are horrible
Blackmists Remorse - If you can get stacks going, great weapon, if you miss with it, feels bad
Hurler King Knuckles - Knuckles are bad, you never get good stats on them, why can't it be all 120 stats like other missions?
Zsusun - Used to be much better before nerf, but wasn't stand out (btw doesn't seem to drop in belt, nor does xbow pistol)
Paw Of Bear - Higher Rate of fire, lower damage / range Blade of Ceres (used to be favorite melee)
Thunderbolt - Surprisingly good damage (not on par with Warbots Bane, but 2nd highest damage stat wise)
Claw of Lizard - A Paw of Bear that hits energy vs poison.. basically a weaker PoB that requires WOC
Warbots Bane - Much stronger than other melee weapons atm