Blizzard has announced that they will not be reverting the overnerf to Mythic Sarkareth.
You can read our post from earlier today for a detailed explanation of how the overnerf occurred! Mythic Sarkareth Massively Nerfed Yesterday — Nerfed More Than Intended
As many players have noted, yesterday’s hotfixes included a reduction to Scalecommander Sarkareth’s Oblivion on Mythic difficulty that resulted in a much bigger reduction than we originally intended.After deliberating this, we’ve decided to stick with the actual value that has now been live in the game since that hotfix.We apologize for any confusion this caused.. Read more on wowhead.com