Is there any work made on making socd work with three keys or more? If not, is there any progress made to make multiple advanced key features work on the same key so we could basically make a three way SOCD ourselves by layering them?
#3 way SOCD
wanton cosmos
simple pond
You could put socd on A and D and on W and S for example. Its better than nothing and no, a 3 way socd isnt possible right now I think
wanton cosmos
Well I rebind Y (Z on the english layout) to D, so that I can still Strafe right in games when hot keying to something with my index finger, so that's not the issue. I have W and S setup and I have A and D setup. My issue is that I want to be able to press Y (Z on english layout) in a way that I only need to bend my finger and not move it to the other key (which I already do with W and S, see images, img 1 walking forward, img 2 walking backwards without moving my finger).
wet imp
SOCD is an abbreviation for Simultaneous Opposing Cardinal Direction so by definition what you are asking for is not socd 
simple pond
Well I rebind Y (Z on the english layout) to D, so that I can still Strafe right...
it sounds like you need Rappy Snappy
its activating the key thats pressed down the furthest