Particularly the construction times of fleets should be looked into. As Kage says, even if the Iron Fleet had totally destroyed ours we could just rebuild it in a single turn, which doesn't really seem fair. Of course, we faced the same risk that once we had destroyed their fleet, we couldn't disband our own because it could just be zombified at a relatively minor cost. I suggest that either cost to construct or time to construct (or both) for ships should be increased, and maybe new ships should have a penalty to performance due to having inexperienced crews.