I thought killing for rogues were never the problem. It is after you kill someone and you are out of stealth. Now what do you do. People can't live through stun, healing debuff, slowed, and being beat on by 3 rogues. Going feral in bg, you have no heal. You lose 1 rogue. You break the team. Then you have to wait for him to rez. Or your toons scatter in different graveyard. I am sure you know about all those rezzing frustrations in bgs.

You have to have someway to regen health and beat on your second target. And resto druid gives you that.