>>GavCo+(OP)
Authors make these kind of changes all the time during their lives to. As long as we have works with rights that outlive authors, the people that exercise those rights will do this just as authors do. We might think that those heirs have less of the “good artistic sense” we see the authors themselves as endowed with, but, it is generally the author’s choice who will inherit the rights, and from there it is those heirs who choose where they are transferred.
Should we weaken that? Perhaps, for lots of good reasons besides preventing updates based on changing social conditions. But every weakening reduces the incentive to create, too. And, if the deposit part of copyright is working, nothing is lost in the changes – all are preserved. (If that’s not working, it should be fixed independent of whether there should be revisions to the rights situation.)