That's been an issue for years, they're already facing those issues. My brother, a USAF Reaper pilot currently on staff tour in EUCOM, said it this way, "killing someone and then going and picking up your kid from school causes issues for some people."
Sort of, but that only works if the antennas are pointed somewhere they can receive the signal. Really it's more that in normal flight modes, the flight control computers keep it from exceeding the flight envelope limits. To go beyond those typically requires a system failure of some kind.
Awareness, a lot. Actual spin training, none. There are procedures for if you get into an inadvertent spin but it's almost certainly a written-off aircraft at that point.
It's not just Garmin Pilot, Aviator Assistant and FltPlan Go both do as well. If you go to Skyvector you can see those blanks are where there are insets or gaps between charts.
Yes? So? There's a lot of crap people hang off the front of planes I wouldn't fly behind.
I am extremely confident saying this would never meet the requirements for certified aircraft.