Although I originally was pleased there was a story mode compared to the other dancing games, I very quickly got bored of the story mode. I also didn't like that playing the story mode had very little effect on your free play high scores or counting towards any other achievements, and I always go straight to hard difficulty, so the story mode was much too easy for me. I was not a fan of the new voice actors for Naoto and Rise but Kanji was a good replacement. The new character of Ms Ochimizu was interesting, but all of the other new characters were not.
Besides all of that though, this is in my opinion definitely the best of the dancing games by far. There are still a few dud remixes, but the music is overall amazing, and I like the new songs Calystegia and Dance! a lot. I also like the art style and how there's no cheesy/weird dances and you can skip through the story dialogue to unlock what you need rather than having to sit through the useless conversations with the characters. The rhythms on the songs feel the best on this one too, with less off beat weirdness than the other two. I would recommend playing if you enjoy rhythm games, otherwise the story makes it a skip.