Stuff off gcd, ok, great. I would love if Blizzard could take a good lock into certain specs castdependency as well, especially for specs like demonlocks.
Tyrant should be an instant cast, dreadstalkers should also be an instant cast baseline and not as a pvptalent. The way warlocks deal damage in BFA is extremely inefficient, our burst requires a chain of casts to be efficient, as opposed to the majority of other classes that clicks an instant button after a sequence of other instant abilities and damage happens.
In a interruptheavy meta with 2-3 kicks per team, and 1-2 stuns plus incaps and other mechanics per character, warlocks dmg is too easy to lock down and avoid.