From Family Fleet Commander:
Ignoring for now the idea of sharing units, we could introduce a feature that allows empires to capture each other’s units in any battle. A secondary part of this would allow a percentage of captured units to desert their original empire and join their new empire. This would all happen within a single battle, with the end result being an exchange of units in either or both directions, depending on several factors:
- Starving your pop
- Low morale
These would all represent a “quality of life” between battling empires, with the one who scores lower being liable to lose more units to capture/desertion. This would also allow smaller empires the ability to gain enemy fleet while being attacked, forcing the aggressor to consider the effect of sympathizers within his ranks.
This would also indirectly penalize hyper-optimization of econ via pop and building, as a low quality of life would become a liability during battle.