Anyway, based on my apparently awful memory, I was under the impression that the krow could only center on one target if it is pointing directly at it. So, I made turrets with a full hemisphere of range. (They can twist too.) So at the moment, the only way they will all fire at one target is if you order it to attack a single unit. But, as soon as you break away the krow from its target, it will shoot it with 2.
So, if the krow is firing at one unit it would look like this.

Personally, gameplay wise, having it NOT be able to shoot at the same target other then one side cannon and the front one, would be much funner. Micromanaging massive units instead of smaller spam units is always fun. The effect worked pretty well in supreme commander. Where the units themselves did fine without micro, which gave you the room to play around with the experimentals. We could even balance it out by giving it a back cannon, and then decreasing the attack speed. Because, lets be honest, after spending a fair amount of time building a unit, it sort of becomes your little robot child that you want to see succeed in it's albeit short life. :3