>>49993477
>so what if it's fast?
It was never a problem that his music is fast(I mean, it was a problem for some people but why would you listen to 暴走 if you don't want it fast?)
The problem is that his songs became progressively less complex and interesting in the overall structure. Sure, he changes tempos and rhythms often which is fun for rhythms games, but it does not contribute much to just listening experience. His older songs were better paced, had way more interesting melodies, variations, even contained stories instead of being one monotonous stretch of fast rythms with flashy colors, whatever lyrics and catchy hook repeated ad nauseam. It's not nowhere near as interesting experience as for example listening to disappearance from start to end.
Note that making music for rythm games does not have to be like that. Camellia keeps churning out j-core for rythm game and he manages to make them interesting. Cosmo's older music wasn't that bad for games either, even if it wasn't the primary reason for their existence. The new songs, even if they are well-produced, really do come off as lazy.

>>49987461
Entirety of the original Hatsune Miku no Shoushitsu is a must. Real and repeat album is pretty good too, but lacks some of the original songs from shoushitsu.
https://www.nicovideo.jp/watch/sm21552463 (and remake)
https://youtu.be/Ywd4XYwVGuE
https://youtu.be/GPLOoykg-ug