Mind sear is a garbage spell. When you multiply 0 by 1000000000000000000000000000000% you still get 0. Mind sear going from 10k per tick to 15 per tick won't suddenly make us strong.
They nerfed Mass Hysteria, it was warranted no one is complaining about THIS nerf because it was obvious.
BUT they nerfed Void Torrent and Dispersion. They killed the skill cap of the spec with this retarded change and they effectively reduced the amount of stacks (so damage) we get in EACH voidform STM or not.
LotV and MS were already garbage, those changes made them even worse than before (and we will actually deal less overall damage in aoe with those hotfixes).
What needed to be nerfed was StM, not the whole spec which already struggles anywhere else besides raids.
Meanwhile Fire mage did not get anything.
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more haste = more damage = more tick = more damage = more tick that can crit = more damage = more insanity = more damage = longer voidform = more damage. (this change nerfed this whole process)