Now, I'd say medium's ready for ranks. But, the note spacing on Easy can easily throw you off. One example starts at 1:54. It starts off just fine, but then bam, at 2:02, the next note is overlapping the note you just hit, but it's 2.5 beats away. Normally this isn't critical but there's both a constant vocal and musical track you're going with, so instinct is to go with the flow. From 2:03, the slider ends and flows nicely to the next slider placed right beside it, and that slider leads nicely to a third slider, but there's an extra one-beat pause in between these two notes that'll, again, throw you off. I believe this happens again later in the song, so you might want to revise Easy with this in mind.
I don't think you need to touch medium though.
