00:15:693 (15693|1,15693|3) - i think that this timing should have both notes sticking together for a better representation of that piano sound, how about this? :: https://osu.ppy.sh/ss/11012423
00:21:026 (21026|2,21138|1,21249|2,21360|1,21471|2,21582|1,21693|2,21804|1,21915|2,22026|1,22138|2,22249|1) - like we talked about irc, let's just remove it and put and LN from 00:21:693 - to 00:22:360 - for the piano that's emphasized here
00:22:360 - All the 3 diffs layering here is literally the same. I personally believe that the hardest diff can use a huge difference in the layering here for the piano echo like this https://puu.sh/AsuVQ/f204ebdd3c.png so it could gives off different feeling of emphasize towards the overall diff in this specific section instead of being the same 1 note
00:23:693 i like how you follow the notes' pitches from here. But from here you can hear the piano is gradually getting louder and heavier, so i think you can add 1 more note to each of these timestamps to emphasize the volume of the piano starting from 00:23:693, then to 00:24:360 , 00:25:026 , 00:25:693 , 00:26:360 . and to avoid clashing with CS' diff, imo it should be a "little" bit harder :3
00:26:360 - This bell melody gives off a distinct feeling of melody pretty far from the piano. It's way too empty here I would say since the song starts to build up in volume and background sounds start to kick in from this point to the 1st chorus. I would do something like this https://puu.sh/Asv2h/54d8ced520.png to layer the bell and fill up the gap for the build ups
00:38:138 (38138|2,38138|1) - these 2 here, i am pretty sure that you are following the vocal here, like what you did here for 00:37:915 (37915|0,37915|3,37915|2) - and 00:38:360 (38360|1,38360|0,38360|3) - , adding 1 more note to there would be better for the consistency~
00:51:804 (51804|0,51804|3) - make [23] the sound repeats from 00:51:471 (51471|0,51471|3,51582|1,51582|2) - and also [23] followed from 00:51:582 (51582|2,51582|1) -
00:53:360 (53360|3,53360|0,53471|0,53471|3) - would change it to [34] here so i would have this weird balance that it currently does
01:03:693 (63693|0,63804|0,63915|1,64026|0,64138|0,64249|1) - Could use some re-arrangement because this one is rly left hand heavy. Tried to play it without problem but maybe it would hassle to the player of 3* caliber. 01:03:915 (63915|1) - just move this to the |3| will do <3
01:07:582 (67582|0,67693|0,67804|0) - i don't like how this column repeats 3 consecutive times, how about moving 01:07:582 (67582|0) - this to column 3 and 01:07:693 (67693|2) - this to column 2?
01:10:360 (70360|2) - i don't think this timing deserves to have 3 notes, the sound doesn't support it. Moreover, i don't quite agree about column 3 having a sudden column repetition there, if it were to have them it should be in these 01:09:693 (69693|0,69804|1,69915|0,70026|1,70138|0,70249|1) -
assumed that you have followed the suggestion that i gave above, 01:24:026 these notes can be changed into LNs to have a clear difference from the 1/2 from before, which is of higher pitches, and the LNs for the lower pitched piano notes. I'd suggest something like this https://osu.ppy.sh/ss/10999891 but you can try to rearrange the pattern to your liking~
01:25:471 (85471|2) - I dont think there is actually bass piano here. If there is, it's pretty inaudible compared to the latter ones. I would suggest to remove it
01:29:693 (89693|0,89915|0) - i think there were just more than a two pianos
01:52:471 (112471|1,112582|2,112582|3,112693|0,112804|1,112804|2) - 建议https://puu.sh/AtgYa/3d53ae3ae3.jpg (其实主要是最后三个note你看看跟pitch要怎么排
01:55:804 (115804|2,115915|1,116026|3,116138|2) - change these into minijack to complement with the piano sound. Probably something like this https://osu.ppy.sh/ss/10999926