00:30:419 - 00:37:804 - for this part and the later ones with the same vocal rhythm, here are my thoughts:
it's nice that you have a consistent pattern that varies over time (going from 4x 1/4th sliders to 2x repeat 1/4th sliders)
what I would suggest is to listen to the pitch change in the vocals (low low high high low low high high) and use that to determine the way you map it
I personally would make the higher pitched ones slightly more intense (so more active rhythm) - so I would suggest using 2x repeat sliders at 00:30:419 and 00:32:265 and switch to the more active 4x sliders at 00:34:111 and 00:35:957
this way the playing experience matches the pitch a bit better
later at 01:36:880 you vary the rhythm exactly like I suggested above, where you go less intense on lower pitch and more intense on higher pitch - this feels more natural!
but maybe consider increasing the difficulty overall in this part with even more active rhythm, since you've already introduced the player to the rhythm earlier
you could even go full active rhythm with a stream at the higher pitch vocals at 01:40:573 like this https://i.imgur.com/cKdxsNN.png
changed first part to be 1 x repeat 1/4th sliders + 2 x 1/4th sliders for lower pitch, and 4 x 1/4th sliders for the higher pitch
changed second part to be 4 x 1/4th for the lower pitch, and then a stream for the higher pitch since the rhythm is familiar now.
also it felt like this part was harder than the choruses so i increased a good lot of the spacing to match the difficulty a bit better.