This just in from Blizzcon:
At least we finally got something out of them, that no amount of cajoling, bitching, begging, and threatening on the official beta forums were able to do.
Combat rogues need help. Apparently on the next beta build, Mastery is being roughly 'quadrupled' [which might be a bit overkill now - hahaha, we bitch when it sucks and bitch when it's too good]. And apparently they are buffing one of our passive talents (my guess would be increasing offhand damage to 100% - that would buff both Mastery and overall damage).
So let's see how the numbers play out. Finally we get something! Everyone drink a shot!
But my gut instinct tells me Mastery might all of a sudden have become a little too good if it's being quadrupled as they say it is. We'll see til the numbers are released and the spreadsheets are updated. Good news though that we're not the forgotten red-headed stepchild after all.