General:
-The soft-hitnormal2.wav doesn't really seem to fit a type of sound that would play on every single note, but it might just be me. o_o
ddd519's Koi:
-Hitsounds?
00:43:051 (5) - Too close to (4)
00:45:328 (3) - Too far away from (2)
01:30:251 (10) - Too far away from (9)
01:53:231 (4) - Too close to (3)
Insane:
00:22:147 (2) - Too close to (1)
00:23:389 (3) - Too far away from (2)
00:23:389 (3,4,5,6,7,8) - Spacing here is too close
Okay, it looks like you didn't use Distance Snap consistently here... the spacing varies a lot and most of the time it doesn't seem to fit. I'd recommend going through the map and resnapping all the notes (except for jumps) to a constant distance. I'd say 1.0x or 1.2x would work well here.
01:43:299 (1) - Remove the New Combo
02:52:021 (1,2,3,4,5,6) - This might be somewhat confusing
02:54:505 (4,5) - This doesn't play well since it only has three repeats and (5) is too far away. Either move (5) closer or remove (4) and extend (4) by a repeat.
03:00:302 (12) - Add a New Combo here and remove it from (1) on the next combo
03:01:958 (7) - ^
03:03:614 (7) - ^
03:05:270 (4) - ^
03:05:374 (5,6,7) - Slightly confusing
03:10:239 (7) - Add a New Combo here and remove it from (1)
03:11:895 (7) - ^
03:13:551 (6) - ^
03:15:207 (4) - Add a New Combo
Yumeko's Ouka:
00:27:524 - Add a note?
00:36:426 (9) - New combo
00:39:524 (5) - Add a New Combo
00:40:773 (1) - Remove this New Combo and put it on (2). Also, I'm not sure I quite like how this goes. I'd recommend moving (2) to where this slider starts, and possibly shortening this slider by 1/8.
00:41:809 (4) - Somewhat confusing (perhaps shorten it by 1/2 and add a note where the slider ends)
00:44:500 (6) - Add a New Combo and remove it from (1) on the next combo
01:27:564 (8) - Add a New Combo here and remove it from (1)
01:29:220 (6) - ^
01:34:187 (11) - ^
01:36:050 (5) - Too close to (4). Also, new combo?
01:39:155 (7) - Add a New Combo here and remove it from (1)
01:41:018 (1) - Remove this New Combo
01:42:674 (1,2,3) - Too close to each other (somewhat confusing)
02:00:681 (5) - Add a New Combo here and remove it from (1)
02:02:337 (10) - ^
02:03:993 (6) - ^
02:05:649 (3) - ^
02:08:960 (7) - ^
02:10:616 (7) - ^
02:13:928 (11) - ^
02:15:376 (5) - Add a New Combo here
02:16:825 (1) - Remove this New Combo
02:17:239 (3) - Add a New Combo
02:20:551 (9) - Add a New Combo here and remove it from (1)
02:22:207 (7) - ^
I found mostly aesthetic issues- the beat placements were fine. Most of the issues were with New Combos. They should generally be placed once every four or eight beats, with some exceptions such as jumps. Good luck!
*stars*