Looking pretty good here.
I also want to give a few words as I go administer the love.
A lot of the map did feel a bit similar to each other. The moment to highlight the most was the cross-etna patterns done in the choruses of [Hard] and [Insane] (01:25:933 (1,2,3,4) - ). Having more cool, neat patterns like that would be awesome to see! Just remember when working with easier difficulties, the patterns can't vary itself too much. When I first saw the 1/4 streams and the cross-etna patterns, I was initially worried that the difficulty would be too hard for [Hard]. But seeing that you used it occasionally and your map wasn't full of difficult things like that, a little tougher stuff to get [Hard] players' feet wet shouldn't hurt too much!
Another thing to say is how [Insane] felt very smooth to play. It was like a knife cutting through butter. Yum.
Anyway, that's pretty much it. Tada!