A big issue with this entire spread is the fact that the rhythm between all difficulties is basically the same.
Like, showing contrast is important, but on the expert difficulty you can map more of the sounds in 00:38:459 (1,2,3,1,2,1,2,1,2) - rather than using the same tired rhythm.
During some sections of the song, the hitsounds blend in with the song. Although you might say "They sound fine to me", listen on the default skin and you will see.
The default skin is the standard for judging hitsounds, so make sure the hitsounds don't blend in when using the default skin.