Oh, that gives me an idea.

A high slot module designed for drone repair. Must occupy a turret or launcher hard point.

Repairs shields armor and hull.
Skill level with remote drone repair to determine amount fixed per cycle, starting with hull first. After hull, then armor, then shields repaired in that order.

Limit: Drones must be in close proximity to ship, AKA orbiting.
(recall those damaged drones before they get toasted and lost!)

One word: lag

After running a few more numbers, it could possibly work, if lag was not an issue, only if the Dominix lost its 10% drone damage bonus.
Sentries with 2 DDAs 858DPS
Light Scout 2 DDAs 283DPS

Edit: Such a modification to the dominix would anger many people, it works fine as is. Would be broken with DCUs leaving the only option as a new hull, at which point why do the DCUs need to be added when the hull would have the chance to be bonused with +1 drone control per level.
In short, there is no effecient way to balance a module with current ships and I doubt there will be a new BS hull coming out any time soon. (Though CCP has suprised me once already they might do it again.)