Good point for the splay. For some reason I didn't consider it, but looking at it rn I could put a some of the keys in an angle which would feel better. I'll consider it for the next release (or a different version)!
I have nothing against 36 keys layout, the only reason for eliminating 2 thumb keys is that I can't find a proper place for the third thumb key where it would be in a nice position. I could add one key at the inner side, but the thumb just goes below the palm and it is not a comfortable position (for me at least). If you have any suggestions, please let me know! There is always space for improvement.
The lateral pinky position wasn't on the first design, but then someone with a shorter pinky who couldn't comfortably reach the top key tried it and suggested to place it there. I tried it and actually felt a lot better. (to reach the top pinky key I need to make a wrist movement, but not like this). I love it.