People support patents because of this idea of it protecting the individual against big companies - but the practice seems opposite to the theory.
This only stems from abuse of patents which have allowed a whole host of trivial things that should never have been patented in the first place.
You also glossed over my comments of "Active Development" for my views on copyrights. If the last person who was granted creative control over a copyright lets it pass by, then it would pass into public domain as anything would now. Such a change to copyright likely wouldn't have that huge of a change in the big picture. It would offer fair protection to a handful of authors and content creators who choose to continue to develop a collection. Anyone doing a one off with no interest in expanding their work would simply allow it to fall along the path of current copyright. If you created a world/setting/character set with which you wanted to make many creations from, and choose to pass control on later in your career, then things stay under the creator's control.