I don't agree.
I always liked the acoustic set, from Zoo to elevation.
I hope it stays, as it is a much needed breather, it's like an intermission before the home run (end of main set and encores).
plus, it gives the band the chance to throw out some rare stuff.
the only thing is: choose the right songs!!!!!! would't you die to hear falling at your feet or fast cars or everlasting love or van diemens?
but I would happily trade it for:
1) a b-side set (spanish, slow dancing, always, love comes tumbling...)
2) a cover set (helter, watchtower, help, I remember you...)
3) a oldies set (11 o'clock, electric co, twilight, another day, boy-girl...)
4) an ambient set (promenade, your blue room, the first time...)
5) a piano set (october, running, sweetest thing, original, one shot of happy...)
6) an edge set (seconds, van diemens, numb, corpse, stand by me, sunday)
this leads me to say: how great is U2? how difficult is for them to make a setlist?