First off, I think that it's obvious that they are never going to drop Streets from the set.
I truly hope that we see WOWY disappear for a while, the song hasn't held up well since Popmart. Mysterious Ways is overdone and unless U2 are willing to give it a new, funkier arrangement, I say it should be dropped. Oh, and Beautiful Day, Vertigo, City of Blinding Lights, Elevation, and Vertigo must go.
Bad is a true beast of a song. I don't have any idea why it isn't played all that often... at least when compared to the likes of WOWY and Streets. If BTBS counts as a warhorse then I'd say keep it.