Alright, this feels like it's improving but I think ultimately, you're being limited by the software/samples you have to work with. The drum, piano, and synth writing is definitely getting pretty good. You've got some awesome improvisation that fits the creepy mood of the source, and those runs after about 2:35 on the piano are damn cool! The sequencing on the piano still doesn't feel very realistic, it feels a little bit too quantized. I also noticed with this listen that the intro feels very detached and there's no real flow between that and the body of the mix. It just fades in and out, and then there's another fade-in at the start of the next section. You can definitely smooth out that transition further with the tools you've got.
In my honest opinion, I'm starting to worry that Garage Band just doesn't have expressive enough samples to really carry an arrangement like this. I'm not gonna say it can't be done, because I don't really know the limits on what your DAW can and can't do, but right now it feels like sample quality is the biggest issue working against you here :\ Your arrangement here is becoming increasingly better with each update, but the sound quality overall is bringing it down in a major way. Maybe a collab might be in order if you really want to bring this up to the OCR bar?