This diff is literally insane, with all those SV changes, it makes it even harder to pass. I'd really really suggest to decrease the HP drain to 5 or even 4. What do you think?
I'll probably reduce it to like 6 or 7 if 8 is proven to be too much (I want to give a "sudden death" type feel tho, so it'll stay if the four note squares don't kill people immediately if you break like 1-2 notes of it