I have mostly soloed my way to lvl 58 and have totaly disagree on each and everything OP said
Solo
Warlocks rocks like never before - you cannt grind at least 15%/hour you have not a slightest clue how to play your class. Its all about picking right targets and right attack sequence.
Grade A for solo
Duo-Trio
Well havent done much trio but duo have pro and con - pro - you get safety net - better roots, healing external power regeneration. con - you get far less exp per kill.... Overall I found that the best duo partner for warlock is coercer - godly good root, nice backup vs. adds (AE mez + single target mez) + massive Int buff + power regeneration buff + moderately good (usefull) AE + massive resistance debuff (broadband). Coercer can completely block spell casting mob from doing any harm (priceless). All in all if mob not considers as a epic - duo coercer+warlock will kill it
Grade B+ for duo
Group
Well here is a tricky situation - you need good tank (preferebly paladin or zerker) and specific targets - aka big groups of 3+ mob per encounter. Killing +++ in group is WASTE OF YOUR TIME - exp sucks and so is loot. I repeat the ONLY type of encounter that can give warlock comparable exp to solo is cyclops. Thats it nothing esle. Second problem in group is power shortage. If you are in good group you wil be sitting at zero power most of the time (and yes I do all this [expletive haxx0red by Raijinn] like t5 drinks/primatic/gebs/intution you name it). In other word to sustein damage warlock must have coercer attached to group or at least illusionist. Buttom line groups are bad for exping for warlock - only use of em if you need finish quest that probably it about groups
Grade B- for group
Problems
Roots - warlocks and wizards have WORST roots in game - take any other class and compare with sorcs and you will understand what I mean. I can take my lvl 50 coercer out and kill heroics +++ all day long with ZERO risk of braking root - only if I get slopy and foget refresh debuff and root got resist to many time in row. My main problem with roots is STABILITY. Ok I can agree that 1 class having unbrakeable AE root was kinda way out of balance I sorry I fail to see a difference between that situation and current situation then wardens, fury, coercers, illusionists - ALL those classes have unbrakeable roots. Bear in mind that discription on Skeletal grasp said - root have half chance of braking compare to normal root .... well total bull[expletive haxx0red by Raijinn]. I'd gladly trade current version of roots for roots with shorter duration longer recast but unbrakeable
Single target DD
I Still dont get it why the [expletive haxx0red by Raijinn] our so called "upgrade" Nul Distortion do LESS damage then prerewamp Nil Distortion. Look its not funny prerewamp NilD did 1476-2106 at Adept 3 .... nowdays Nul Distortion at Adept 3 do .... 1106-2056. Dont give me a bull[expletive haxx0red by Raijinn] about shorter recast timer because we lost BSS during rewamp which was solid 850-1100/9s. Once again Soul Blister still not cut it off. I did not see any reason for NERFING our Dark Pyre line of nukes (before rewamp it did 333-555 damage every 6s) now its dot lol Shadow Pyre do around 600-1000 damage ... over 12s (including cast time)
Canibalization
Ouch here as well - before rewamp 500health=400power every 20s with Grisly Contract Adept 3 .... nowdays 400 health 233 power every 20s with Ghastly contract Adept 3 ... can we say sucks?
What is good?
New spells - Dark Investation - first real dot that deadly as hell if you know how to trigger broodling. Its still somethat bugged - broodling not scale up - and stay at lvl 52 which make em litteraly useless vs. anything that lvl 59+. Nul Careless - FANTASTIC spell - saved my [Removed for Content] more time then I dare to count - in a sence its PBAE knockback + 91% slow (read stun) for 10second.... And AE stun it what actually I always been missed on my warlock not anymore.... Netherous Realm - SOE made us AE class and this spell boost out AE ability to new lvl - simply like that
Rewamped old spells - Tongue Twist line - let just say Vulian Intrusion its 7.7s stifle of mob that not epic, Devastation - 4s stun in the end is god send, altought damage of devastation been nerfed still before rewamp Adept 3 did solid 560-688 for a 5 tics total after rewamp it do 396-712 for same 5 tics which net a lot lower final damage but 4s stun in the end is danm good. Dark Nebula now actually AE stun. Damage isn't that great at all even at Master 1 (593-983) but stun is stun.
What is different but can be consider is a ok trade off
Well Nil Abs - its do a lot more damage then prerewamp but its on same time with rest of AE but this timer is shorter but it take more power to cast this spell then it was before but it still less then total cost of prerewamp.... So I'd say we even
Aura of Emptiness - well we did lost 10.7s stun but we got damage booster for ~1000-1200 every fight but for a cost of power (and AoE not cheap to cast) - well all in all I consider it even
Deter-Thwart - we got shorter casting (from 4s down to 2s) but we pay for that shrinked duration of stun (from 8s stun down to 3.5/4s stun) but now this stunds do mean damage ~980-1680 for Thwart Adept 3
Torment of Shadow - Scruge of Night - its dot - was useless still useless - it use to be great pulling spell with long long range .... not anymore, but casting time went down to 1s from 4s which is good. Damage per tic been nerfed somethat (not by much but still Adept 3 scruge of night do about as much damage as did torment of shadow adept 1 prerewamp) but power cost been seriously reduced which raised DPM of spell very notably (from 4DPM upto almost 10DPM) - so all in all we even here
Abysimal Fury-Boundless Fury - well it was useless it still more or less useless. It was crappy AE with huge casting time (5s) its now crappy PBAE Rain. It gain much faster casting time it do more damage (heck it do enouth damage to be consider as actual AE attack) but now its not limited by 1 encounter its true PBAE which make it very suicide spell for warlock it will [Removed for Content] off every single mob half zone around you. So use it with causion. Spell was bad and its still bad but now it have at least some use. I cound it even
Chaotic Maelstorm - it was Dot with Nox debuff - now its AE selfreplicating nox debuff. We lost damage on it but we gain AE effect.... so we even