It's very interesting to consider the effects. But why should we link death with the release of copyright? While temptation of assassination is probably reduce

It's very interesting to consider the effects. But why should we link death with the release of copyright? While temptation of assassination is probably reduced with extra-long copyright duration after death of author, it's a lot saner to assign a fixed-duration copyright from the original release date, not from (whole life of author + fixed duration). The problem goes away if you have a fixed duration from the start.