Well i think the Not Your Grandmother's Fatigue model might be along the lines of what you want. haven't tried it yet myself but it does say that a string of successful sinkins will improve crew performance while failures will lower it. Take a look at the read me and see what you think.
My only reason for not trying it is I'm just getting back into SH & want to give the original game a run thru before adding more mods.
Ooops, forgot which forum i was in.
