00:12:293 (1) - You could just remove NC here and have an NC on 00:13:150 (3). It's not a very significant sound and this will emphasize the instrumental at 00:13:150 (3,4).
00:23:264 (2) - Something like https://imgur.com/a/jVHXHdo would flow better. Current one flows a bit awkwardly since spacing is low and you are pushing the playfield into the bottom-right corner.
00:28:407 (1) - Since this note lands on a finisher, there should be higher spacing to give it more emphasis, similar to what you did with 00:55:836 (1).
gave it slightly more spacing, didnt give it as much spacing like 00:55:836 (1) - since it sounds weaker imo
00:55:150 (4) - This could just be a slider since the vocal on 00:55:321 (5) is very minor.
00:56:864 (4) - More of a visual preference, but you could move it a little more to the left so it looks like it's stacking on the slider end of 00:55:836 (1).
01:25:321 (1) - Think you could just remove NC. Doesn't really do much since you NC 01:25:836 (1) anyway.
01:27:893 (3,4,5,6,7) - Spacing is a little excessive for an Insane. Could tone it down a bit, especially since the chorus doesn't even have jumps this large.