My guild attempted to do ICC25 this Friday. We've been doing it for months now and know almost all of the fights. This time around, when we did Blood Queen, people were dropping like flies to her AoE damage. We've kept up with it fine in the past but some of our raid healers even went oom within a couple of minutes.
I noticed that tick damage from the mutated infection dot on Rot was also ticking for quite a bit and nearly killing people even with our new large HP pools.
Has anyone else experienced this?