Reply to Cut Healing/Magic Reflect/ReturnFire/Void/Shield While Stunned?
Short answer: Stun makes a lot of sense to counter other abilities, that currently are passively still funcational. Cards like Lord Arianthus, which has become one of the most used tanks, could be much better countered with a stunner. It makes so much sense and would be a nice way to add some more rock/scissors/paper element to it. And since there are not so many stunners, it would not change the meta too drastically.