Not at PC right now, so I can only answer to the 'objective' issues
1.) Refer to JBH's post. Due to sliderbodies changing in sampleset for easier ticksounding, some tools note it as missing, while it is used
2.) I'll look at those later, though as long as it's clear for the player it should be fine
3.) Most people know the song as Image -Material- <Version 0>, as that is Scorp's metadata, which is however incorrect. Then I got told is 新曲 instead of Version 0. I decided to add these jnto tags so people could find it more easily. As for Reflec Beat, a cut version of this song was into that game (IIRC)
4.) I think higher HP would be too harsh for most players, as it's rather long, and there are some breaks after spinners which cause HP drain. Setting it to 4.5 (maybe even to 5) will likely not hurt too much, so sure! I'll change it
5.) I have seen that a lot of players actually get confused by a lower AR, due to it all being too cluttered. I always had it at 6.0, but before the BN mods (2nd round) I decided to highten it to 6.5 to increase readability. Setting it to 6.0 might not hurt that much, so I'll chage that too!
I'll look at the rest tomorrow
Thanks!