This change would have nothing to do with people being Orc or not. You can use Blood Fury with the trinket and your regular swifty abilities (Avatar, Dark Soul, etc) right now. Also, removing ~5k str/agi/sp from swifty macros is still a huge deal, even if some small percentage of people do go Orc. Blood Fury is not nearly as strong as trinket.
I know, but just like human was the FOTM in cata it would give people even more of a reason to go orc than their already is. If you remember back in BC there were few damage percentage increase abilities in the game, the only major one I can think of is death wish, in my opinion those abilities need to be removed or made less potent because the amount of damage capable with them is making this game less about skill and more revolved around ability stacking. But that's just how I feel.