I for one am perfectly content with the state of demonology on the PTR. In fact, my only concern is that we're so overpowered currently that nerfs are inevitable.
My Voidwalker has agro coming out of his pores (so far -nobody- has managed to pull agro off of him, and trust me we've tried), and with the 30% damage reduction from Improved Health Funnel, 15% from Demonic Resilience, 10% from Master Demonologist, and 12k armor he has at 70, he's virtually indestructable in melee.
With just my health funnel he can easily tank Fel Reavers, Durn the Hungerer, that-elite-demon-guy-at-the-portal-on-the-mountain-in-Nagrand, Socrethar (with none of that pansy having-a-quest-mob-help-you stuff) two instance mobs (Magister's Terrace) at once, Onyxia, and god knows what else.
With a resto druid casually healing, he can tank multiple heroic instance mobs, stuff like the guard mobs in Gruul's Lair, groups in Karazhan, and pretty much anything short of a level 70 raid boss.
Fel Synergy means zero downtime when hunting with the Felguard (as opposed to having to Health Funnel him every couple of fights as we do on live), and in combination with a Voidwalker hitting Suffering with max Demonic Brutality and Demonic Empowerment, you can pretty much chain SoC without getting agro, while your pet remains topped off at full health from synergy.
The new Fel Armor keeps our health topped off pretty much constantly. Life tap to full mana, and keep hunting as your health will come back to you. Downtime was already extremely low for demonologists in both PvE and PvP, but it's just plain silly now.
The combination of Demonic Tactics, Improved Demonic Tactics, and Demonic Pact, means Demonic Pact is almost up 100% of the time (you'd be surprised how often this procs). Turning Demonic Pact into pretty much a flat 10% spellpower increase for the warlock, and adding a significant buff to your group.
Improved Enslave Demon is once again worth it (as it was at level 60, if you disagree you're wrong). The Doomguard hits like a dumptruck (1k normal, 2k crits), and can keep Cripple up for 20 seconds every 30 seconds. As Cripple reduces attack speed by a freakishly large 45%, that's awesome. He's now a lot easier to summon (no death required in a group, and 100% spawn from CoD on green+ mobs) as well. Without Improved Enslave Demon, his enslave breaks will hit anywhere from 20 seconds to the full 5 minutes. And I do mean anywhere. It's extremely random. But WITH the talent, you're pretty much guaranteed the full 5 minute duration on the first enslave (after which I do recommend ditching him for a fresh specimen). 5 minutes of mad DPS while the target is weakened significantly is easily worth 2 talent points.
The Inferno spell is a little weird at the moment. The Infernal only lasts a single minute, which for most intents and purposes is a little on the low side. Personally I've always loved using him as a tank on anything heavily reliant on fire damage or fear effects (as he's immune to both), but with a 1 minute duration that's a no-go currently. His DPS on the other hand is massive. I've only used him once in PvP, on an unsuspecting Boomkin, who then died in seconds without any intervention from me, but it seems to make for a nice and quick PvP kill button.
Then there's Metamorphosis. Hit it, charge the current target and activate Immolation for a lazy 10k damage while you re-apply your DoTs and start nuking with 20% added damage. Huge damage increase every 3 minutes.
In PvP it's the ultimate I-Win button against any melee classes (including the now much dreaded paladins). The only PvP concern I have for it is that it's SO powerful, we'll end up planning all our combat around it, avoiding fights until meta becomes available again.
At level 70, in demon form, you can easily break 20k armor. On top of that you have 6% less crit vulnerability and 50% stun reduction. Adding 20% more damage dealt just seems to add insult to injury for all the other classes out there. And I'm not even talking about the full potential at level 80. A cursory glance at future equipment suggests to me that we'll be able to break 50k armor (you heard me) with relative ease.
So all in all, I consider demonology warlocks in the 3.0 patch as it stands now to be in a state of Pure Raw Awesome (tm). Now I'm just waiting for the nerf bat to swing our way again.
