The whole "death of the author, plus 70 years" is absolutely insane. It basically ensures that any kind of derivative work is impossible while anyone who witnessed its original release is still alive, meaning that all but a handful of works will have been forgotten and lost. And for what, so that six generations of publishing company shareholders can freeload off an ever-decreasing flow of residuals?

If we truly wanted to protect and promote the arts, we would've stuck to the original "14~28 years since publication".