Great write up.
As far as the prices go, maybe not.
If they can sell say 50% of the seats at these crazy high prices, then lower the price some over the next five months before the show (maybe even have a couple price reductions throughout the five months), they may make out better than if they just started out at the lower end prices. I am guessing once there is a price drop, people will go back and buy the tickets (and I am sure it will piss off some fans that already paid the higher price).
I can't imagine a U2 show not selling out. As the price drops, I think they will all sell out.