Thanks!
We were having problems with the same loot dropping over and over again. In MC, all we were getting was Felheart/Cenarion over and over again with some Nightslayer thrown in. BWL kept dropping the same stuff, too.
We decided to change the person who starts the raids each week, and the loot we get is completely different now. Seeing some completely new drops and a lot more loot. I started last week's MC raid and set a guild record with 12 BoE's and over 20 cores.
I know Blizzard has said that the loot table has nothing to do with the raid leader, but the fact that we went for weeks with the same loot, and then suddenly get different loot the week we change raid leader seems to be more than a coincidence! You should try rotating the leader and the master looter, just to see what happens.