This was a wonderful ending. It feels really full of hope, in stark contrast to the girls last tour ending.
Plus, the 'girls last tour' girls actually proved that there was precedent for this kind of thing. They were fine with each other because they were so used to each other. I think that's part of it. If you can define someone else, and someone else can define you, you both remain stable. But you have to have a deep connection or the definitions aren't true, and you both start to become altered.