I'm finding a bit of imbalance with the game's fleet upkeep system. It seems that it's based on total available crew capacity, not USED crew capacity. I'm not entirely sure this makes a lot of sense to me.
Say you've used all your available fleet capacity, and begin a large engagement with most of your fleet. The enemy reinforces more quickly or effectively than you do, and you're forced to retreat with substantial losses.
Now, you find yourself in a position with decent enough credit income, but are extremely stunted in your ability to rebuild fleet as such a large chunk of income is lost to "fleet upkeep".
Seems more like you're paying for the ability to build x amount of ships, when in fact you do not own (or can afford) x amount of ships.
I think it makes sense to have to research the ability to increase your fleet capacity, however I think the actual upkeep cost should be based upon ships owned, not on such a seemingly inefficient scale as it is now.
My nub .02 anyways.