I, too am skeptical, but I don't claim to understand the process fully after reading this thread. Some random thoughts:
I find the idea of trading or voluntarily giving waymarks to other players intriguing and needed. Eventually, people will leave or maybe GroundSpeak will receive a notice saying that 'so-and-so has just passed away.' If there is no way to transfer ownership (as currently understood) to another player, the waymark has no active caretaker, other than the officers of that category. Trading or giving away waymarks would help keep waymarks up to date, since there would be someone who is taking interest in it. I'm not sure that I would be willing to trade my waymarks (it's more about my self progress than getting all the tiles).
Involuntary transfer of ownership because someone decided that I had not put enough into a waymark or changing of a waymark that I had submitted without my even knowledge of a pending change to me is a problem. Some of my waymarks are short and probably could use a little more information. I have gone back to waymarks and changed information as I have gained new information. One thing I've been wrestling with is how to document changes at a site since it was originally submitted and approved. Using the example of a church, let's say this church was a 125 year old building with a tall, white church steeple, housing an Episcopal congregation. I log it under "This Old Church." A few years later, the steeple is blown over in a massive wind storm and is permanently removed. A few years later, the Episcopal congregation moves out and another group moves in. How will this be documented? I as 'owner' currently have the ability to control what content is on there, and I, personally would prefer to preserve the original text and add notes that are dated to the bottom. But someone else might have the preference to keep the text 'current' and delete out the fact that the church had a tall, white steeple, or that it was Episcopalian at one time. If I understand the previous submissions, under the new scheme, I as the submitter and original owner wouldn't even know it was changed, let alone be allowed to express an opinion as to how that waymark should be documented.
A log of coordinates for 'roving' or moved waymarks is a good idea. I just logged an artistically painted vehicle and in the owner's blog, he states that he is going cross country with it. It would be great to have the coordinates change were it was last seen, but have the page keep a log of where it's been, too.