I started leveling up an alt warlock. I think warlock is a great choice to play no matter what because the class literally works with every other spec and class in the game and has never had a bad season. After the patch I just see them becoming alot more stronger.
I can still see it being decent after the patch. It still brings alot of ways to lock down healers/casters. The sham and paladin would need to coordinate CD usage against warlock teams better than the current mindless spam of tremor.
I could see other melee cleaves like TSG giving it problems if it becomes more popular after the patch.