My one complaint, if I had to dig for one, is that it felt a little slow getting Rin on the bus, but I'd rather have something a little slow than something super rushed. Or something like Love Live where it feels like they spend 4 years pulling a girl, kicking and screaming, into being an idol.
It's going to be inevitable that some characters are going to get the Takane treatment and get shoved to the side/treated as jokes (esp. when the CG girls are a lot quirkier than the 765 girls), and there's probably going to be a drama bomb later, but honestly? I've been super into CG ever since it came out, so I've been waiting excitedly for the anime... And this was the first episode I had hoped for. If it keeps on like this it may even surpass the original anime (which was good but had its glaring faults).
I also really digged the Nation Blue BGM arrange.