Yes and to me this seems like a huge positive for both the sport overall and for women's competitive running.
Absolutely. I've been a big fan of the change being made at Boston and New York. I think it would be great to see that on a more widespread basis.
Should not be that difficult, simply delay the start of everyone outside the women's elite/invited corral(s) by five to ten minutes.
Probably more like at least 15-20 minutes and I would think starting the women earlier than the original plan would, if logistically possible, be more palatable to the cities involved. I don't see why it would be a big problem, compared to everything else they have to do, to close down the course and have it ready to go even 30 minutes earlier but I have no idea what goes into a big city marathon. It would seem possible to do with 2 months notice and I'd love to hear that they are setting plans in place to do so.