My other car is a MINI!!!!
Hmmmmmmmmmmmmmmmmm, 12 hours and nobody has replied!
I think that's probably due to the technical nature of your question!
I'll be honest, I can't comment on requested vs actual load, I've never logged this on my AGU (should have done!)
Boost and vac readings sound 100% normal to me, and those fuel trims are nothing to worry about, 4% or more is usually where you'd start looking for a problem.
142g/s sounds a LITTLE low, but not by much at all, I'd expect 150ish usually. Most I've logged on a ko3 was 158g/s with all stage 2 mods and a stage 1 map.
As for N75 DC, it's not ideal of course, because the turbo is being run flat out, but many, many stage 1 ko3 maps are like this, the tiny little turbo struggles so much to make any boost against the large port AGU, that the wastegate remains shut throughout the rev range.
All in all, it sounds OK to me, it's nice to read a post where someone actually describes their situation fully rather than leaving us to guess!
For interest, what kind of requested and actual load percentages ARE you getting?