I knew my idea of a non-refunable ADR fee would go over like a lead balloon. But I think it would greatly diminish the number of ADRs made - particularly way in advance. This is a good thing. You want to double and triple book until you can make up your mind? Go ahead, but it will cost you. Someone will say that it hurts Disney because the restaurants will be empty, but that's just nonsense. There will be lots of ADRs made within a couple of weeks for each date as people's schedules get finalized, and there will always be plenty of walk-ups to make up any difference. It would probably result in less empty tables than there are now.
I still think the trouble with your proposal is that it supposes that people will be willing to pay non-refundable fee to eat at a location. If said fee was credited towards food/beverage/tax/tip/cashed out, there would be fewer problems. As it is, not only are people being expected to pay what amounts to a cover charge (of course, if you want to kill
DDP, this isn't a bad idea), but it runs contrary to standard business practices. In the real world, you will have high demand locations require a CC guaranty, but I have yet to see one that had such a deposit. If such a system was industry standard, I think you might have better luck.
Additionally, you are supposing that Disney will have the capacity to deal with same-day walkups at the "lesser" locations. Think of it this way - if people are being charged to made an ADR to ND, they aren't going to bother. But, on park day, when they get hungry at 5pm they find other restaurants are full. That means that they are going to go with the lesser place. But, since lots of people will get hungry at the same time, open-5 will be far below capacity, 5-7:30 will see long waits, and after 7:30 will be catchup. The current, no fee, system encourages people to make an ADR for a less preferred time as a backup in case they can't get an ADR or walkup to the preferred location. If they get what they want, they can let it go without fear.
But, I will propose a compromise. Charge a fee. But, the fee is refundable if you call 24h in advance to cancel. Additionally, if you make the reservation within 24h of the meal, there is no fee to make the reservation. That will encourage folks to cancel ahead of time, just as the current CRT/etc set ups do. Additionally, it will still encourage people to make ADRs instead of walking up.
Still, I will always believe that the biggest culprit is the 180 days. If it were 45 days (chosen becuase you'll have paid for your package, so you know you're going - too many people book ADRs even though it may only be 50/50 that they actually go on the vacation), yes there will be alot more people online/on the phone...but once you know that, instead of making that second/back-up ADR for the same night, you'd be wise to just move on to the next night.
I like this idea. The 180 days put me in a position where the responsible thing for me to do was book the ADRs while finalizing the actual package. Heck, I booked a CRT before I even started working on the package. I ended up cancelling it, but I knew that at 60 days I needed to make the reservation just in case.