I do like that they all stayed. I'm a little upset that Shauntal no longer has her Jellicent, but she replaced it with Drifblim, which is a total bro, so I'm good. I'm happy that Alder is gone, too. I never really liked him as a part of the Pokemon League, just as a wise and strong trainer.
I do wish that they would have given a small change to the other teams, too. The only one to really change anything was Shauntal. Still, I love that they're all back. <3