(1) Aircraft rarely fly in anything close to formation in combat - large gaps are the norm (1-10 miles), and one would think that increased distance is something that could be exploited by an unmanned platform (able to take more risk, etc.)
(2) Remains to be seen.
(3) Individual Patriot missiles are around that price point, with S300/S400 anywhere from 500k-2M depending on capability. One would think that cost-per-kill would be favorable considering the increased capability granted.
Some of the stories could plausibly have SC involvement (the story of the same name is most likely) - but I don't think it's explicitly mentioned anywhere.