I figured this would happen in some form or another because it got the fusion rifle blanket stability buff. They cant have a hard hitting basically auto rifle all the sudden have good accuracy and stability, so they tossed this nerf in to raise its time to kill. The closest weapon and arch type to the mythoclast would be high impact auto rifle which currently requires 7-8 headshots to kill. So they nerf VM from 5 headshot kill to 6 in the newest patch in case you were thinking about breaking it out and dominating. If it still has the goofy cone spread while firing it wouldnt have made any difference except at point blank range. So for future nerf cryers the went and pre-empted your outrage.