Interesting proposal! The main thing I’d like to see out of such a project personally is consideration of more procedural workflows in geometry nodes (String to Curves Node — Blender Manual).
There was some discussion about that here previously: Text mograph nodes design
That procedural workflow allows some real benefits in flexibility and performance. It would be interesting to see how that could be pushed forward to make it more interactive and intuitive. I think it would be a bit of a lost opportunity to do a 3D text project without considering that aspect as well.