There needs to be a choice node between knocking down and interrupting cast.
The changes to caster mobs in Mythic+ make the spec a non viable detriment to the group at for max keys. When the level is high enough that any cast will mean death, earthquake proc’ing right as a kick is pressed will result in a dead player the majority of the time.
This is exacerbated by the fact that deaths are even more punishing due to the timer increase.