So, here are my 3 suggestions that all go together.
1st: Airborne creatures are not effected by flooding.
2nd: There be amphibious creatures that are also not effected by flooding.
3rd: Floods upkeep nerfed to 1
or even none at all.
I havent really decided if I like these or not, so instead of just pondering them in my head, Id see what others think
Reasoning for "amphibious" passive skills is very simple. I see no reason a frog should die, and yet, a freakin robot/machine (steam machine) survive.