I got a few ideas which will probably never get done at this point
1 - actual css static analysis -- consume html + css, and provide tooling to preview what properties are inherited given the context you're in -- what you're overwriting, what display mode you're in. If there's inconsistent display modes depending on where in the html you are.
2 - a reactive html scripting language which using html as the source of truth, and synchronizes html elements through their relationships to each other
i only have prototypes, and unfortunately given the climate i feel i am the only person who wants these tools.. but every few weeks i get to sit down and get some progress and that's nice