Yeah, I just gave Falling Apart a play, and it does do a good job of keeping things interesting. As you go, the song itself, the beatmap, and the visuals increase in intensity, keeping the player engaged. Mirai didn't pull it off nearly as well.
IA/VT is great, but some songs are way too long. And I think it would really benefit with an extra difficulty level.
More variety would be good too, there were about 10 JIN songs if I remember correctly.