I've just finished my very first sins game, i wasn't in the beta's

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Anyway, a few things bothered me.
1: When i want to upgrade my fleet size it takes a certain % from my income, but i feel that if i do not use those extra slots, like when my fleet gets destroyed that i should have my income back. So even though i could get up to 400 logistics points (19% fleet maintanence) if i only have 200 used, i should only get taxed 9%.
2: I guess i'm to tired to remember, but i was sure i had another thing on my mind.