Sorry if I sound harsh. I do not mean to sound that way.
A little surprised that you want letterboxing during breaks.
Just want to say that I don't particularly like the unsymmetric and sharp curved sliders used in Normal, but I guess if you really want your map like that, I won't bother asking further about it
Normal:
Normal/Aesthetics:
02:05:012 (1) - change the direction a bit so it does not overlap with 02:03:887 (2)
Combo:
00:04:637 (1,2) - fits the music better if you remove 1's new combo and add a new combo to 2
Hard:
Normal/Aesthetics:
00:30:887 (2) - I don't exactly like how this overlaps with 00:30:137 (3)
01:42:512 (5,6,7,8) - the transition between the slow slider and the faster notes was unintuitive for me
01:48:137 (1,2,3,4,5,6) - Playing this section was just painful for me with such slow sliders that I can't exactly justify
02:02:387 (4) and 02:03:137 (3) - the overlap made the pattern look a little messy
02:07:262 (1,2,3,4,5) - it is really unintuitive to play really slow sliders with normal spacing between notes
===================
Mostly minor things that I didn't like playing through. Make the changes you want, contact me, and we'll see where to go from there.