Yo! Before reading, just know that I ain't 100% sure of how group stealth works, don't know if it breaks if you move etc. This is just a thought of it working for party/raid members for those short durations just to pull this off.
Ok, so I read that rogues will get an ability that's a group stealth, so your party members will be stealthed too. Imagine a Rogue with a Balance Druid/elemental Shaman hit the Arathi Basin Lumber Mill undetected and instantly push everyone down the cliff before the enemy could even react. Since the abilities are instant.
A solution would be to stand away from the cliff close to the mill, but bring a DK to grip the healer for the ''knockbacker'' to push him down OR have 2 ''knockbackers'', one to push the enemies close to the ledge, and the other to push them down. Some have their advantages like a paladin bubbling or a mage ice blocking mid air etc. but it's gonna be an interesting new tactic in MoP. The point of group stealth with the combo of this is that you won't see it coming until it's too late.
Now imagine Eye of the Storm, just stealth with a rogue and approach all the enemies at the flag and BOOM. Never saw it coming!
Thoughts? I'm just sharing some BG tips and heads up for those who wanna look in to this =)