This seems well thought out. :hmm:
The original fatigue factor of SH3 was simply moronic. SH4 took the step of including 3 separate watches. Since we don't have that in SH3 I kind of like what you've done here. I often play entire patrols or large parts of my patrols at 1x TC. I also play GWX but even with their 8 hour fatigue model (which I like and prefer to everything else out there at the moment) at 1x even this becomes hard to deal with at times. One thing I don't want to do is go to zero fatigue. That's as moronic as the original factors in stock SH3.
This new scheme you came up with might help.
I especially like the idea/concept behind the General Activity Zone. IMO it provides more immersion to a degree even though I still have trouble with damage control workers not tiring out quickly. Of course, your counter argument about the ridiculous repair times in SH3 pretty much negate that anyway.
Keep us apprised of how the test career works out. I for one am interested in this.