Sorry for taking so long to get back on this, thanks for the feedback!
A couple things tho that I did differently:
-m2: I don't really hear a lot going on in the original for this L.H. part: I only hear the bass play the F#'s on beat 1 and 3, and an organ D on beat 2. Aside from the melody I can hear a countermelody part, but since it's quite soft and about as busy as the melody, I don't think the arrangement necessarily needs it included. tl;dr maybe you could do something like this:
I like filling out the chords more if possible with simpler bass sections, so if possible I would like to keep the Ab (quarter) and the F# octave.
For m3, I did the pattern but did keep some of the more original notes, let me know if this doesnt work.
-m4-16 (as well as m20): This whole section has the repeated-pinky thing going on, which is easily fixed with using another chord tone (usually the 5th from the bass note, sometimes the 6th whenever you see an An on Bn in the L.H.) instead of repeating the root notes. Whenever you're dealing with a fast piece, it's best to avoid repeated notes as much as possible.
m4-16, I instead opted for an octave pattern rather than the added 5th/6th chord.
-m21-24: Playing the softer organ voice in the middle of the L.H. is quite hard in combination with the rhythmically heavy slap bass part. Personally I think I'd leave out the organ voice, as it's quite soft and doesn't add as much as the slap bass part does.
I opted to merge it with the bass as I would love to keep the organ, as I know in a lot of remixes and orchestral remixes (i know I'm not arranging those but) tend to have it more prominent.
-m6 and 8: I think you could leave out the 16th runs on beat 3-4, as they're pretty hard to play (especially if you wanna hold down the C in the melody), and they're not as prominent in the original. The bass part does a good enough job of filling out the empty space.
I did up the Ab to make it hopefully easier to play. I do at least want to keep the second run of D F G, but understand if both still should be removed.
-m9: The run in thirds on beat 4 is pretty hard to play at this speed. Maybe you can just keep in the Bn on beat 4 and remove the other 16ths? It'll be easier to end the run in beat 1 of m10 on just the C and (high) Eb, but you can keep the low Eb in if you want.
Opted to do two 8th notes of the B on beat 4 and and a C on beat 4.5.
Thanks again!
