Actually, a bomber formation with 2 gunners is very tough to attack, and you are correct, convergence isn't a problem them since each gunner can aim his own guns on his own plane. It also tends to make it so the enemy plane is not masked by the same number of guns on each plane (ie, the tail may be in the way for the top gun on the center plane but for the outside bombers it might not be blocked and can fire too). I've seen a couple of times where dual gunners in formations have really caused havoc and tore up planes... all the other stuff though, the damage carrying over and such, still applies. Make sure you set your convergence in the hanger for bombers, most people set it out to the max of 650 I would guess to make you have at least some longer range firepower for dealing with fighters.
When 1.11 comes out is the million $ question. They've been working on it for quite a while, but sort of changed direction with what they wanted to accomplish in 1.11 sometime mid-stream. They've already shown quite a bit of artwork changes (new planes, updated planes) and some new graphics, so we can assume that those parts of the patch are mostly complete. They have mentioned that the focus will be on gameplay balance, or at least that's one item they were working on, and you can see they have still very recently been talking about methods to control some types of play that are generally accepted as "gamey". I'd say we'd be lucky to see anything by years end, though January is probably a reasonable target for the new release... but that's a total guess only based on what I've heard/seen.
-Soda
The Assassins.