stop dueling in town and get some real pvp
tse, why are you posting images of dps in pve?
my level 35 mage can literally do 2000 dps grinding on camps of murlocs. (extremely contrived and rare situation) Those pictures don't impress anyone. (Are you SERIOUSLY bragging about doing 207 dps in stratholme?)
Who was it that called Cone of Cold a snare..? Cone of cold is only the highest dps AoE spell in the game
I guess the only use is the chill effect? You don't use CoC for the snare you do it for the extremely high dps.
Are warlocks good 1v1 duelers? ... I don't really care. I just don't care.
In large scale pvp you don't use poly, it's irrelevant. No mage will poly in 20v20 fight they will be dishing damage as quickly as they possibly can.
So anyway
Warlocks can't really kill anything, they have cheesy out-of-combat utility such as soulstones and summon. The pets are a nonfactor in large scale pvp. The dots are nearly worthless due to the 8slot debuff limit and the limited usefulness of dots in pvp anyway. They lack versatility. The fear, especially the AoE fear, is nice. Downsides are that any competant horde guild is going to be majority undead and immune to fear. Any competant alliance guild is going to have a large number of Glimmering Mithril Insignias which make them immune to fear. Nevertheless, the AoE fear is useful and so is the single target. But is it MORE useful than say, a mage that can do 750dps PER PERSON in a 10 yard radius over 6 seconds then go immune to all negative effects and damage for 10 seconds? Or a shadow priest that can AoE fear and also heal, nuke and dot better than a warlock?
Or a hunter that can aim shot from range again and again for 2400 damage crits? And also has pets? And a mana drain? Not to mention extremely long range and low mana reliance?
Bloodpact is nice though. Shadowburn is nice too but don't run out of shards, and you're basically imitating a mage anyway. Locks give up other things that mages have so they can get pets, dots and curses - things which are nearly completely irrelevant in large scale pvp.
But really, warlocks are a wasted slot in large scale group pvp. That player could be much more effective as a mage/hunter/druid/priest/rogue/warrior/shaman
I'm not sure why TW has so many damn warlocks