Random mod from a bad mapper, I don't think this will be helpful, just some random suggestions from looking over this map and playing the first half a couple of times (mostly in the streams, not great with jumps).
[Legend]
00:31:350 (1,2,3,4,5,6,7) - Perhaps change this into 3 sliders 2 circles or 4 circles 2 sliders (like the other patterns) for consistency's sake? This pattern seems a bit out of place.
00:54:750 (1,2,3,4,5,6,7,8) - It's about the same sound as 00:45:150 (3,4,5,6,7,8,9,10) but the pattern is much more spaced. It does feel a bit more intense, but not enough to warrant that kind of spacing imo. Or space out the other stream a bit more.
01:15:000 (2,3,4,5,6,7) - Space this out a little more and move it off the repeat slider?
01:19:950 (9,10,11,12,1,2,3,4,5,6,7,8) - This part feels a bit awkward to play as there is a pretty big gap and sudden change in direction.
02:02:550 (6,7,8,9) - Spacing again. It's in a lot of places, I'll try and point out as much as I can. It's not that big a deal, but it looks and plays a bit wonky when the spacing is suddenly much smaller.
02:46:650 (5,6,7,8) - ^
02:45:000 (3,4,5,6,7,8) - ^
03:18:750 (1,2,3,4,5,6,7,8) - ^
03:23:400 (6,7,8,9) - ^
04:34:667 (1,2,3,4,5,6,7,8) - This pattern looks interesting, but a bit ugly... try and make it a bit more like 04:52:314 (7,8,9,10,11,12,13,14) ? I think you tried to make the same kind of pattern, but did it much better in the latter.
Lots of awkward turns in the spaced streams like Desperate-kun said. I'll try and point out some of the weirder ones.
05:13:200 (11,12,13,14,15) - Things like this appear often, not going to write this for every one. While it follows the general direction - which should play okay - the one note out of the flow makes it seem like a bit of an abrupt/awkward turn. These should probably be polished up a little.
05:17:250 (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16) - The spacing is heavily reduced here. I agree that there should be a reduction in spacing, but this feels like a bit too heavy a reduction in spacing. Perhaps space it out a little more?
05:25:650 (8,9,10,11,12,13) - This is fine, but it might play/look a bit better if spaced out more.
05:30:975 (8,9,10,11) - Not that awkward, but I think you can change the position of these circles to make it flow better rather than changing direction slightly.
05:32:400 (11,12,13,14,15,16,1) - Not sure about this. It might be okay, but to me it looks like this whole pattern plays a bit odd. Perhaps add a few 1/4 sliders to change direction rather than the circular motion here?
05:35:850 (9,10,11,12) - This one isn't so much of an issue in playability, but probably should be polished, too.
05:43:650 (4,5,6,7,8,1,2,3,4,5) - Same as 05:17:250 (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16)
05:49:275 (12,13,14,15,16) - This stream as a whole feels a bit odd, but I think this section in particular will cause a lot of breaks. Perhaps the same stuff with 1/4 sliders?
05:51:075 (4,5,6) - The 5 feels very out of place. Same with the 4 in 05:52:200 (3,4,5) and in 05:53:700 (7,8,9) . These are the more extreme examples that I talked about in 05:13:200 (11,12,13,14,15) but this time the notes being talked about could even just be removed (and the stream extended one note).
06:07:650 (1,2,3,4,5,6,7,8,9) - Same kind of stuff as 05:43:650 (4,5,6,7,8,1,2,3,4,5) . Perhaps space it out a little more?
06:23:250 (5,6,7,8,9,10,11,12,13,14,15,16) - ^
07:09:750 (13) - Not sure about this turn.
07:13:275 (12,13,14,15,16,1) - Same kind of thing with 1/4 sliders, especially the turn in 07:13:575 (16,1) .
07:14:325 (10) - Weird turn again.
Though this is a long mod, most of these are just nit-picky things/suggestions. The stream spacing isn't too big of an issue, it might just be more aesthetically pleasing/flow better if some of them are more consistently spaced. The awkward turns are the only real issue in playability I could come across - the spacing by itself already makes it extremely challenging to the very best, the awkward turns just makes it frustrating.
All of that being said, this was a really, really fun map to play, even if a tad unpolished. I really do hope this does get ranked (if I didn't like this map, I wouldn't mod it) and this is one of my maps of 2015 so far. Best of luck in getting it ranked!
(Also someone please mod some of the spacing outside the streams that I'm too inexperienced to see pls)