00:00:015 (1,2,3,4) - may be nitpicky but the movement here feels kind of random, not quite zigzag not quite a curve, not sure what you were going for. a curve, straight line, or zigzag would all work here but this is just what
01:57:083 (5,1) - kinda hard to read to have a 1/2 gap after a 1/4 slider since you haven't really done that throughout the map + 01:57:194 which is a very strong sound gets no emphasis at all. might make more sense to do something like https://imgur.com/kAp0hZv
03:47:875 (1,2,3,4) - idk if this pattern works for the rest of the section. this places a lot of emphasis on (1,2), which works for 03:47:431 (1,2,3,4) - because of the pitch, but idk about the rest. since by default (1,3) is emphasized by the instrumental.
worst case imo is 03:58:540 (1,2,3,4) - where nothing in the song would support emphasizing (2), but 03:47:875 (1,2,3,4) - , 03:50:097 (1,2,3,4,1,2,3,4) - are all not ideal
listening to the song, i was able to decipher the harder hits of the piano from the softer ones, someone who isn't a musician might not be able to hear it that well but i can, so instead of following just the pitch, i decided to follow both the pitch changes and the strength of each keypress