That's not a fix for walking. Or if it is, it's the equivalent of using a nuke to fix a hangnail. That's your personal preference, and it wouldn't work for DVC. DVC members have had the flexibility of making these types of changes for decades and if DVC suddenly became this restrictive, they'd have a revolt on their hands. I think they know that. I don't see this ever happening.
Here's the thing. One of the main reasons that DVC holds its value compared to other timeshares is that it IS different from other timeshares. 1. They didn't invent, but they did pioneer a points system. When DVC first started, timeshares were sold in blocks of weeks. Today, most of the major timeshares use a points system. Why? Because DVC proved the model. 2. DVC doesn't nickel and dime you to death. Other timeshares add so many fees, they aren't really all that much cheaper a method of travel. This is why I'm opposed to using fees to address walking. Why start down that road? 3. DVC doesn't hassle you endlessly about buying more points while you're on vacation. Now, I think they miss some opportunities here. I wouldn't want them holding a parking pass hostage to my agreeing to attend a timeshare seminar, but if I were DVC, I'd certainly consider stuffing an advertisement into the check-in package inviting non-members staying on points to a free meal/seminar. 4. And yes, DVC allows many more types of modifications than most other timeshares. You think that's a negative. I think you'd find that the vast majority of DVC owners think that's a positive.
DVC could make lots of changes because that what other timeshare do. What made and makes DVC special is that they can afford not to do so. In fact, this is my chief complaint against tiering benefits. They don't have to do this to sell points successfully; they ignore more potential traffic than most timeshares ever see.
I know that you're a consistent advocate of complete cancel for any changes. It's just not realistic; it's never gonna happen. If it ever did, DVC would have a meltdown on their hands bigger than New Coke.