Meh, I don't really care about stadium vs arena, because I'm always close enough that it doesn't matter. My biggest problem with 360 was that they had this huge stage... and it didn't really do anything. It was just big. The half assed tie-in to space and astronomy was stupid, and a half baked concept. The song selection was very adult contemporary, and I felt especially the 2009 shows needed more rockers.
However, I did get to hear Ultraviolet, Unforgettable Fire, Zooropa, Scarlet, HMTMKMKM and perhaps the biggest WTF moment of my U2 concert career, Your Blue Room. 360 wasn't all that bad, but this tour is the best since Elevation for me.