This would work well .. basically like the Rider Swap. Having to physically go to the ride puts a barrier of entry .. which helps control the demand (which I feel will be needed). Things like mobile ordering (at all restaurants, not just WDW ones) is eliminating the "difficulty" of making an order physically .. thus overwhelming restaurants with too many orders at peak times, thus causing horrible customer service (in long wait times, no human interaction, cold/wrong food, etc.)
I think it is key to be implemented WITHOUT the need of a phone/app - just scan your band .. and go (and look on the app later to see when your return time is), but I don't see that happening since they have that technology built-in already to
MDE for Rise.