plus considering it is probably the ONLY 41 point BUFF talent in the game (with the exception of holy paladins) I would imagine every single shaman (whether multiboxed or not) would go up in arms, simply because another nerf to them, no matter how small would cause a mass riot, if stacking was taken away.

It would be as tho you couldn't have two shadow priests in a group and everyone benefiting from their regen etc