So today I did heroic MgT, and all and all I'd say it was a fun challenge. What was not fun, and incredibly frustrating was, having to change a dps to kill Priestess.
For adds we had the Shaman, the Rogue, the Warlord, and the Hunter. Our DPS was a Mage, Rogue, and a Hunter. And we simply couldn't do it. All mobs aside from the Warlord cannot be trapped, and trapping him was insanely difficult.
So we played around a bit, changing up who we cc'd. And we couldn't do it. Hell, barely 30 seconds in and it looked as though it was over each time. So we changed to a Warlock, a Mage and a Rogue. Easy.
FYI, we 2-3 shotted every other boss. Wiped 2-3 times on trash, but that was it.
Heroic MgT is a fun challenge. But Priestess requires an excellent makeup of dps, and any class that couldn't CC was out of the question, to be quite honest. It doesn't have to be this difficult for it to be a challange, and for it to be fun.
The boss is a pain, and I feel sorry for any dps class out there that cannot crowd control.