What they should do is make copyrights for natural persons longer than for corporations or assignees or works made for hire. Once the person who made the original work relinquishes it, any intrinsic value is lost.

Once ownership is transferred, it should move closer to public domain, because the original owner has alienated it anyway.

The original owner is not deprived of value under such a scheme, because they don't have to assign it or produce it in a corporate form or work for hire context.