When they first announced 20 Mythic as the new singular format for high end raiding, they said the reasoning was to be able to make much more use of class utility to make encounters more interesting because in the larger format you'd be more likely to have said utility available, and I was pretty excited and very possitive about it. Yet now with the new announcement of class ability pruning, they've directly said that they want to reign in class utility to the lower base, rather than expand on those with little utility by offering them more. It seems like they're trying to "fix" a problem in class design, that already stopped existing with the change to the raiding model.
On top of this, they're aiming for reduced mobility for ranged classes and healers; and with encounters designed around the toolkits available, this kinda suggests that actually ranged and healers won't really be expected to move much either. So if we don't need to move, and don't have any tools left (Warlock utility is particularly passive - as strong as it is, it actually requires the other players to click it); we're not left with not a lot to do beyond DPSing stuff. Where are those moments for you to let your class 'shine' going to come in, that 20 Mythic was supposed to be all about?
Edit to be clear on a couple of things:
- I am completely fine with and all for reduced mobility and more focus on 'skill moving' with instants etc.
- Utility isn't just raid cooldowns; it's interrupts, knockbacks, stuns, slows, speed boosts, misdirects, taunts etc etc.
- Losing availability of utility isn't just about it being cut from a class, longer cooldowns and shared DRs also reduce availability/frequency of use.