Its just a constant complaining about "herp derp class is dead"
Lets look at statistics from warcraftlogs where warlocks on the 75% percentile place:
Antorus:
1st place: Affliction
5th place: Destro
Tomb:
1st place: Affliction
7th place: Demo
Nighthold:
1st place: Affliciton
3rd place: Demonology
Trial of Valor:
12th place: affliction
Emerald Nightmare:
3rd place: Affliction
Hellfire Citadel:
4th place: Affliction
Blackrock Foundy
2nd place: Demo
Highmaul:
7th place: Demo
____
So after 2 expansions the ONLY time warlocks have been average was during Trial of valor. And still they were ahead of monks, all mage speccs, all dk speccs and all hunter speccs.
Why is it this constant jammering on MMO forums, discord and the blizzard forums from butthurt warlocks complaining that the world is ending every time new content comes.
If anything it would make sense to maybe let other classes "be on top" aswell. Shamans for example? Balance druids? Ret palas? No class has been consistently at the top end of raiding appart from warlock - and still they complain every single patch. it "feels" like they are just complaining for the sake of wanting Blizzard to tone back nerfs lol
So yeah, imo wipe those tears away locks - you will prob end up just as strong as always.