00:48:161 (5) - why not try it like this so you can emphasize the pitch down http://osu.ppy.sh/ss/13072591
00:07:361 - ~00:44:161 - all same rhythm and it feels really boring, you should give some variation at some parts. For example, 00:30:961 (5,6) - replacing them into kick sliders for expressing better vocal, 00:34:861 - 00:38:061 - 00:39:261 - expressing them... Making this small variance can improve your mapping skills a lot.