On my hunter group if a mob actually gets to me before dying it always ends up being melee'd by my main and auto shot by the followers. I have never really seen a dead zone at all since they changed that.

If they end up aggroed to a follower all I do is hit the back button for half a second and all the toons but who has aggro get in shooting range. A hunter shouldn't be a problem at all as a follower to a rogue, just make sure you get a hit off with the rogue first to get the aggro. Or shoot it from a distance and hit em up from behind with the rogue as it is running towards the hunter.