This looks great!

I noticed that the strumming seems a bit off on chord changes. A good default is to let strings that don't change on chord change to continue to ring through. Just think about the strings as actual strings and the kinds of things that happen to them when you play.

Also, different songs will have different techniques like bar chords that may have less brightness, palm muting etc.

I'm working on a physical guitar digital luthier kit right now as part of a project at Toronto Metropolitan University working with disabled musicians. Our aim is to release it so anyone can build one.

Here is our documentation of examining an existing assistive guitar built a few years ago in the UK. https://www.designingsoundfutures.org/kellycaster-mark-1/

Now we're taking lessons learned from that and working on robust versions for touring musicians, and variations to adapt to different assistive and artistic needs.

Great to see others doing nifty work with this guitar based music stuff.