00:00:487 - considering how hard to later sections are, you can start by actually using doubles in this intro. Like doubles when the lead and the bg sounds combine
00:12:794 (12794|2) - it's less awkward for left thumb users to have this on col 1 so yeah
00:17:102 (17102|2) - move to 4 cause 246 connects are the best
00:19:871 (19871|0) - LN this for symmetry
00:21:717 - current pattern is too hard you can go with this
http://osu.ppy.sh/ss/958915100:25:871 (25871|3,25871|4) - you kinda want to avoid note combinations like these as it has an inherent bias against either left or right thumb users. So you would want to make this more spread out by having one note being in col 1, 2, or 3 and the other note at 4, 5, or 6. Ideally. Same hand combinations without col 4 usage however is also ok.
00:26:025 (26025|0,26179|1,26333|2,26487|0,26563|1,26640|2) - this is overly biased and heavy on the left hand
00:27:563 - i dont think using quads is a good idea for this diff. Triples arent as commonly used and then you throw in a quad.
00:31:256 - this further expresses the need of triples usage. It produces patterns like 00:31:256 (31256|0,31256|1,31256|2,31256|3,31410|4,31563|3,31563|6) - which is rather awfully hard for this diff and doesnt even scale well from Normal in terms of difficulty.
00:32:333 (32333|5,32333|4,32410|1,32410|2,32487|4,32487|6,32487|5,32487|3) - no please dont. This is not an I diff. This is too hard.
00:34:487 (34487|2,34640|3,34640|5) - this will be less difficult to play if the notes are respectively arranged as 4 and [35]
00:40:487 - what i dont even. This is some 4* tier patterning please avoid this. It's too much of a difficulty spike for a section as early as this. You can nerf it by:
00:41:102 (41102|4,41102|6,41102|5,41102|3) - triple
00:41:256 (41256|0,41333|2,41410|6,41410|4,41487|1,41563|3,41640|5) - make this simple stairs (ie not broken like this)
00:42:102 (42102|6,42102|5,42179|2,42179|1,42256|5,42256|4,42333|3,42333|1,42333|2,42333|0) - singles followed to a quad. Do use col 4 for the singles for rigidity
01:01:717 - this is waaaaay too rolly. Consider adding rigidity to this like utilizing 1/2 minijacks
01:04:179 - too hard do a double - single - double alternation
01:29:102 (89102|6,89410|5) - ctrl+g that disconnect from the 1/4 stream is quite offputting
01:31:871 -
http://osu.ppy.sh/ss/9589197 less awk owo
01:43:871 (103871|5) - 10x more comfy in col 1