The thing about artists is that they know how things are supposed to go. We on the outside think everything was great, but they know where all of the "mistakes" were.
As you noted, them crying after the performance shows that they haven't become jaded, that these things really mean something to them. They'll probably feel the same when they appear at that British festival. I think they're the first Kpop group to do that, or headline or something?
I'm glad that the girls are getting a break after this concert in Australia - they seem to be getting a little worn down. They still have a few things, but they've got a month now with not that much stuff to do, so maybe they can rest and recharge. I predicted that this tour would be huge, but it's turned into a monster. They've at least doubled the attendance and income of the previous record (Spice Girls) and are creeping up on the list of best of all time, which right now is all guy groups.