I'd love to see restrictions of some sort on walking, and for what it's worth, walkers have never affected me before so its not a personal experience issue I have with it. I just detest the practice. It is not the way the system is intended to work. I suppose it is a current feature of the system but it is not the intention of the system to allow this. I get that all the rooms get filled at the end of the day, so someone is still getting the rooms, but it isn't right the way people have to one up each other all the time to make sure they get what they want even if it means screwing 3 other families in the process. And its not that someone got the preferred dates and someone else didn't. It's that you mucked up the room availability in the weeks before you finally stopped walking. Its the families trying to get rooms in those weeks I feel bad for. They shouldn't have to waitlist or follow walkers adding a day at a time and that gets messy trying to get one at a time. That's how you get broken up reservations where people are trying to get that 1 missing day. If the system could have just been used as it was intended to be used they could have just gotten the full booking when they should have and it wouldn't have been so much trouble. Then these broken up reservations increases the amount of split stays that occur so people can cobble together their whole trip. Then this results in more housekeeping costs because of increased check-out dates and rooms needing to be flipped.
I also do not share the same concern as others here that the solution would have ramifications we don't want. Sure the solution will have ramifications, but any such ramifications largely only affect mass-modifiers or spec bookings. Walking is an 11month on the dot issue. I get that people will book and then maybe want to modify by a couple days after they see flights or plans change, but that is a modification that does not occur during the 11 month booking window where walking creates issues. You're not making that legitimate modification 15 times over the course of a month at the 11 month mark on the dot before your initial window closes. For those who book longer than 10 days, that is fine. You can still modify and add, but the key is you are not dropping off the first night so this is legitimate. And sure, any solution won't completely eliminate the issue. Large point owners would probably be able to book initially and then just keep adding days to make it a 25 day booking and then later when they are out of whatever window drop the initial 20 days, but a solution would make a large dent in the volume of walking. Also, despite the impression you will get around here, 500-1000 point owners are the exception. Most owners have less than 500 points. You will likely find most owners in the 150-300 point level. So even though large point owners would likely still have an advantage with any restrictions on walking, restrictions of some sort would help limit the problem walking causes.
Having said all that, Disney could create a solution if they wanted, but the rooms get filled, Disney doesn't care, so nothing will happen.