Blizzard shared a Blue Post explaining that they will not be making any changes to the Kael'thas or Lady Vashj encounters in the upcoming week. Blizzard previously said they would be nerfing the content before quickly changing their mind.
As of right now, Blizzard is paying close attention to player feedback on this issue before making any changes to the current raids.
Hello!We’re still discussing this and looking at options from a design perspective. We haven’t made any decisions yet, and we. Read more on wowhead.com