Like I don't mean to be vulgar but I have to sincerely ask, "what the hell happened"?
***On Lordaeron***
We've been begging for the server to get easier, and now icc 10 man marrowgar is hitting harder than saurfang heroic on icecrown. He has over 12 million health points, and he was very hard to kill on 10 man normal, even with 5.65k gearscore. The fight felt overtuned and my entire guild was telling me they're considering leaving if this sticks, donators and non-donators alike.
So my question is, what's going on with these changes? Marrowgar was already overtuned and now he just got buffed even more.
Edit:
Pugging is nigh impossible now.
Your group needs to do 41,667 dps for 300 seconds before the enrage timer, which means the tanks should do about 3k dps together, so 38,667.
The dps barrier to entry is 6,445 dps just to get into icc 10 man. That's a ridiculous amount of average dps.
Unless the enrage timers are different, this is by far waaay to high of a dps increase to even get properly geared.

