i think the overall rhythm in this section 00:48:581 - could use some rework, i get what you're doing but right now the way you shifted back and forth between the melody and the background percussion is kind of... confusing ( 〃..)
like 00:49:748 (6,7,8,9) - here you have (6,7,8) follow the melody but then you went on to disregard the synth on 00:50:359 - abruptly
i think what you can do here is to follow the synth/melody first and foremost, AND then switch into the background drums whenever the main melody is not playing a new note
so for example :
00:48:415 (1,2,3,4,5) - keep rhythm
00:49:748 (6,7,8,9) - follow synth (map the sound in 00:50:359 - )
00:51:248 (1,2,3) - keep rhythm
00:52:415 (1,2,3,4) - follow synth (map the sound in 00:53:026 - )
00:53:748 (5,6,7,8,9) - keep rhythm
00:55:081 (1,2,3,4) - follow synth (map the sound in 00:55:692 - )
etc
pay attention to where you place your new combos — right now the placements of your new combos are very notably inconsistent, especially in the calmer parts
on placing new combos i would suggest to add a new combo on every downbeat (the long white line on the editor's timeline) as a starting point, and then proceed to add more new combos on areas/patterns that needs more emphasizing from there on
this was already discussed in discord earlier but yeah, your intro section is *way* too intense than it should be :(
i know that you're planning to remap it soon so i'll just drop in a few tips that hopefully can be helpful i guess :
use a lower slider velocity in general — this helps to build the much-needed contrast with the rest of the map
don't be afraid to ignore certain sounds in the song, as not every sound has to be mapped and every so often "undermapping" things may result in a more desirable outcome
having a constant stream of 1/2 circles is fine but if you do so avoid arranging the circles in a pattern that involves too much movement (e.g. as in 00:31:248 (3) - )
I think the visual spacing of some of your bursts are inconsistent:
(https://osu.ppy.sh/ss/19052366/0469 vs https://osu.ppy.sh/ss/19052368/837b)
the first image is 1/6, whereas the second is 1/12, yet both look identical, and is gonna cause a little confusion when playing, as players can't visually distinguish the speed of the burst other than the approach rate and how fast they appear.
personally I think it'd be better if you were to decrease the spacing of the quicker 1/12 bursts (https://osu.ppy.sh/ss/19052371/59bd), and be consistent with the spacing as it'll condition the player to know the difference between 1/6 and 1/12 bursts, making it a lot more intuitive to play