Great response, sir
Personally, I love the fatigue mod. It puts 'management' back into crew management. I've easily operated even green crews for long patrols (read: non-RUb crews with RUb fatigue - meaning they're much less qualified/lower-ranked).
It's easy to get scared of RUb fatigue at first, as I was. It's even easier to get scared of it when you didn't actually play it.
But it gets progressively easier to love it once you learn the ropes