I've got a Note 4 but I am certain that it would be no different than with the Note 7.
I can't speak for the glass screen protectors, but I'm using a plastic screen protector that came with my Otterbox case and I can use the S-Pen just fine.
I wouldn't worry about the S-Pen working with screen protectors (or the plastic ones, at least).
To address your last point, the pink Note 7, if I understand it correctly, is not available in the U.S. / North American markets. I could be wrong about that, so correct me if I'm wrong. If I'm correct, then it would explain why AC did not show it in any of their coverage of the phone.