I like the idea of non-transferable copyrights a lot. That would make the “this is motivation for innovation / just protects inventors and artists” claim a lot more believable to me. I don’t think it should even be passable to descendents/“estates”.

And maybe also disallow “our employees’ inventions/creative work copyright automatically goes to the company” clauses. This would be… Waaaay more complicated to sort out, but still worth thinking about imo.