So we've had a few bits of loot from the beta servers, not all of it granted, but enough for me to be slightly worried.
We all know our mastery as shadow isnt the best, which at this moment in time puts mastery wayyyy below any other stat (im not sure how much this will change as we level up, but i cant see it being as big a jump as it needs to be without them changing our mastery)
A quick glance at the loot tables we've seen upto now, there isnt one piece that has crit/haste, its all crit/mastery haste/mastery etc etc, the hit/spirit is ofcourse useful, but only upto a certain point in the first tier of raiding.
What im trying to get at is that our choice of loot is likely to be extremly narrow with mastery as it is now, we just wont want it above crit/haste once we're hitcapped, yet at the moment you dont seem to have a choice on the loot we see, its all mastery.
I'd hope they buff our mastery so that its as valuable to us as it is to other casters.