The first copyright law in the US granted 14 years + a renewable 14 years.
Make it apply retroactively. Clean, simple, no exceptions, grandfathered special interests, or variations for special industries.
This nukes all the exploitative actors in the industry, like the textbook publishing industry, patent trolls, IP hoarders like Sony, Disney, etc. It turbocharges culture - gives everyone an even playing field, right when we need it most.
It makes AI use cases clean, but might be worth formalizing - $150 or %15 of revenue relative to the total percentage of a creator's fair-use content in the training data, whichever is greater, and the per item minimum gets decided each year by the office of the copyright, adjusted for inflation, etc.
No more technical gotcha game bullshit making lawyers and giant corporations insanely rich, just in time for the AI revolution, and best of all, it makes vast swathes of data legal for open source and small businesses, with no barrier to entry.
Groups like Anna's Archive and SciHub can come to understandings with publishers, transitioning from pirates to first-class archivists on the internet, letting them engage in legitimate commercial activities without threat of legal peril.
No more soccer moms getting slapped with nonsense million dollar fines by MAFIAA lawyers.
The entire industry of rent seeking copyright grifters gets nuked from orbit, and nobody gets hurt. The old paradigm of middlemen and studios and platforms justifying all the apparatus and exploitation through providing "legal services" and exposure and access to IP goes kaput.
A whole lot of the pacing and timing around copyright laws originate with conventions from pre-electricity times, and only get perpetuated because grifty people want their legalized scams to continue.