Regarding setlists and warhorses. I don't think people are giving U2 crowds enough credit. I understand the whole "the people who were there loved it, so nyeh!" argument. But I feel it's kinda flawed because it basically means that the fans wouldn't have enjoyed the show as much if those hits weren't played. But U2 has A LOT of hits, so there's no reason they couldn't swap a variety in and out every night. The 1st half of the set seems to have been well-crafted, so there's not too much wiggle room there. The 2nd half however, doesn't seem to have any cohesion or theme at all, save for the Bullet->Hands->Pride segment, which is tied together. They could easily do a lot of mix-ups from the intermission onward and still send fans home in a daze of happiness. Taking out all the new album material, they have a mountain of songs to fill the rest of the concert with. Look at the list of some they have already played...
The Electric Co, Out of Control, Vertigo, I Will Follow, Bad, Sunday Bloody Sunday, Until The End Of The World, Even Better Than the Real Thing, Mysterious Ways, Gloria, Two Hearts Beat as One, Stuck in a Moment You Can't Get Out Of, October, Elevation, Angel of Harlem, Desire, When Love Comes to Town, Sweetest Thing, Bullet the Blue Sky, Pride (In the Name of Love), With or Without You, Beautiful Day, City of Blinding Lights, All I Want Is You, Where the Streets Have No Name, "40", One, I Still Haven't Found What I'm Looking For (And some more that I probably forgot.)
Then you add in songs that were singles, or hits, or at the very least are generally known by the U2 fanbase...
11 O'Clock Tick Tock, New Year's Day, A Sort Of Homecoming, The Unforgettable Fire, Running To Stand Still, In God's Country, One Tree Hill, Zoo Station, The Fly, Who's Gonna Ride Your Wild Horses, Zooropa, Numb, Stay (Faraway, So Close!), HMTMKMKM, Discotheque, Gone, Staring At the Sun, Please, Walk On, In A Little While, Electrical Storm, All Because Of You, Magnificent, Get On Your Boots
That's around 50 songs! They could do so many swaps every night without messing the flow of the show (more so in the 2nd half) and no crowd would leave disappointed.