aye.
[Easy]
Something which really bothers me is the really plain structure you use for the difficulty. You use 1/1 sliders and circles for the most time, and some single 1/2 notes and longer sliders appears. I also find this doesn't really looks like an Easy difficulty. It doesn't feels really hard, yet I wouldn't think it's supposed to be Easy.
00:10:474 (6) - Something you should consider is to have enough break times - which also means to have 1/1 breaks sometimes. They help the newer players not get exhausted that fast and feels more enjoyable to play.
00:19:343 - 00:27:691 - Since you use this section as Kiai you could try to emphasize this more, with fancy slider shapes and longer sliders. It currently plays rather boring than interesting or at least that the music harmonize with the hitobjects well. This is what I thought about:
https://derpovic.s-ul.eu/HwTufVpf00:34:995 (5) - replace the slider with a note and keep 00:33:952 (3) - empty.
00:43:865 (5) - Remove this note, similar reason like 00:10:474 - .
00:44:387 (1,2,3) - for example (and this is the only good example I've found) could be used more for sections like 00:10:995 (1,2,3) - and 00:27:691 (1,2,3) - .
These are just some parts I've mentioned, there are more other similar parts like that you should fix the same way.
[Normal]
00:19:343 (1,2) - Did you tried to use a 1/1 slider instead, like on 00:23:517 (1) - ? I think that would work pretty well. The part from 00:19:343 - 00:21:169 - could look like this anyways:
https://derpovic.s-ul.eu/DLKa0Lbv00:21:430 (1,2,3,4) - has a good rhythm and can stay like that.
00:23:517 (1,2,3,4) - Should be changed like here:
https://derpovic.s-ul.eu/DLKa0Lbv00:27:691 - 00:35:517 - Try to make that consistent after changing the section of 00:19:343 - 00:27:691 - .
00:37:082 (3,4,1) -
https://derpovic.s-ul.eu/NPyBXMDu Remove the repeat from (3) and add a 1/1 slider on 00:37:604 - , it fits much better with the vocals.
Generally you should try to have some more consistency in the difficulty, 00:02:648 - 00:19:343 - and 00:36:039 - 00:52:213 - are quite differently mapped which makes the emphasis on what you actually follow weaker. Using sliders and circles on this and that part should have a reason for you and you want to show why you use them like that. And that's currently very difficult to determine.
Taking a single example on 00:10:995 (1) - and 00:44:387 (1) - : Basically both works fine but it's like... it seems it doesn't matter to you what you use at the end - which isn't good. Using a slider means that you used it to follow the holding tone, while a circle is just a single click. It feels very different from object to object. You don't have to use the exact same slider and circle for the same sound, varierty can be used but currently it feels too various and random.
[Hard]
I don't think that the gap between Normal - Hard will be fine like that, however the difficulty looks for now good so I wouldn't make Normal harder or Hard easier, that's nonsense. @Gordon you very likely have to look for something between your normal difficulty and tutuhaha's Hard.
00:52:213 (1,2,3,4) - I honestly would consider to use a spinner like Gordon did before. Following an inconsistent beat is kinda frustrating for many players.
That's it from me, good luck!