Kitzbuell,that sounds like an awesome mod.I had 7 dead crew men on board for one month last patrol.

I am bumping this post for good reason!!
Also,I hate the crew management aspect as its very unrealistic.You have guys sitting on the helm the whole trip who never get tired while guys in torpedo rooms getting wasted just laying around in there.I'm thinking of removing this aspect in my game because I feel that crew will rest in torpedo rooms...there are bunks there in typeIIA afterall.No more putting people into the crew quarters.....but only some people as others are superb masters of coffee consumption.
I feel that the buttons on lower right are suffice and crew efficiency should go by whats chosen there only.............................................. .................................
All surfaced modes have slightly higher efficiency loss compared to same function(surfaced torpedo/submerged torpedo)while submerged.
Cruise modes have efficiency regeneration for all crew members with submerged being higher.
Attack mode and when damage control is clicked then the efficiency decline is at its highest.