Seriously, other classes getting buffs doesn't mean Locks are no longer playable. The way i see it is that through sticking with a class you learn all ins and outs and can start having real fun in trying out things (instead of playing cookiecutter on the fotm).
If you play competitive and your class is not viable, you're not going to have fun. If you can play your class to 95% and another guy with a diff class plays his class on just 60% and can beat you with relative ease, then there is no fun. Right now that is a case with warrior vs warlock for example.
And as for Rogues, they have been our counter all throughout WoW; only this season have they seriously sucked ass. so them being more powerful next season is only reasonable (plus blind cooldown has increased to two mins/prep no longer resets CoS).
CoS cooldown is halved, they'll have it 7 times available every 5min, now they can use it 3 times every 5min. As a warlock, that change is going to suck hard.
And rogues are not going to be just more powerful, as it is right now on the ptr, rogues are very overpowered.
Monks will hurt, that's fine.
Monks are right now a big counterclass to warlocks already and they are getting massive buffs to "everything". If it wasn't because of monks are a rather weak class for arena right now, you'd have been even less viable right now.
Warriors will hurt (less), but they always have
Compared to now, they are actually going to hurt harder since they are getting their damage buffed. However, they'll be a bit squishier.
Hunters will hurt less (i think??)
Stays the same
Mages will remain annoying
They get their damage buffed though. RoF will no longer instantly activate, but for the rest, mages ain't changing a lot.
Shadowpriests are getting nerfed
Shadow is getting their hybrid healing slightly nerfed. Sustained damage buffed and a small nerf to survivability. They need a little nerf anyway.
Dps shammies will never get love
That's why both enhancement and elemental are getting decent buffs?
Pallies are kite-a-licious
And yet they can still hammer on you all day long because of freedom and their speed increases. Nonetheless, they are getting a really nice buff to their hybrid healing and a few other little buffs to make them more viable.
Dks are counterable since we have our blanket silence back (thank god)
Following that logic you counter everything that uses magic. Death knights are still a big counter to casters in general, and as far as I know, we warlocks, are casters. Not to mention they have the biggest counter to our gapmaking mechanics such as demonic leap and demonic circle: teleport
Droods will hurt some more, but are controllable
Since our cc is being nerfed so hard, we'll have to rely a lot more on our partners for controlling druids... Ferals will be less annoying though due the nerf to cyclone.
Locks will be tough as they have 10% more Sta and 10% less dmg taken, they have blanket silence, fear and blood fear not sharing dr's or cd's, still have that awesome sacpac shield and... oh wait, that's us
Right now we already have a blanket silence, we have blood fear that's a lot stronger then normal fear and blood horror combined, we already have sacrificial pact and with half of the comps we play we have access to 10% stam. And guess what, we are in the worst spot we've ever been since s1.
it'll be fine... all fotm reroller please f* off to play monks and rogues, real locks are locks 4 life
I really doubt there are any fotm rerollers left that currently play warlock seeing how bad we currently are.