I'm excited.. I'll probably buy the 360 version even though the framerate's supposed to be a little slow and the facial detail's a little less-than-perfect; there's still not been a game that's convinced me to throw down on a next gen system, but I really want to play this.
As for that effect, that was in Ground Zeroes too. Since there's no radar anymore, the glowing guys serve as a sort of ad-hoc beacon. But I'm pretty sure you can turn it off. I do like your theory though and would like to subscribe to your newsletter.
One great thing about the games is the level of detail and interactivity they have. It's fun trying out a crazy thing as a player and then finding out that the dev predicted a player might try that and even prepared an event or other thing in response to it.