#1. That's bullshiit - ACOGs weren't even a dream when I went through Basic. Nothing but irons. To say that is one of the reasons NTCH is trainined is way off base...
#2. Never needed to adjust it, for any engagement adjustments, and the pull is perfect. Believe me, I adjust ALL my Geissele Hi-Speed triggers (one DMR and two National Match). I've adjusted both my Elftmann trigger, and adjust them for others ("fixed" Eltfmanns for others here...). When I tell you I didn't need to make ANY adjustments on my Jard, I mean it. I'm not "missing" anything you're referring to.
You seem to have all the answers, so enjoy your backwards scope mount. If you HAVE to have your scope mount literally backwards, to make those scope's eye relief work for you, then you ARE doing something wrong, in your body position. Seems to be working for you, backwards, though, so drive on.