This could have been mentioned or suggested earlier in the thread, but I have not read all20-some pages of it. I apologize in advance if I am about to suggest something that someone else has already posted about.
Earlier in this thread and in the past, different people have suggested some sort of individualized transportation method where a family or a small group people could enter some sort of vehicle and tell it where to go and the vehicle will plot the shortest route from their location to their destination and get them there, on demand. When there is greater demand, more vehicles would be added to the system, and vice versa when demand dictates. I do not know exactly how the system works and the actual mechanics of how the vehicles get from pint A to point B. (Are the mini-monorails? Are they at ground level or elevated, etc.)
I think an interesting solution to the issue would be to overlay the monorail system with this on-demand sort of idea. If you build a netwrok of monorail beams around the resort, its a lot like building a network of "highways" or a network of "rails" for that on-deman system. The additional beams wouldn't need to be a loop necessarily. If Disney can find a better way to handle track switches (making them safer and faster), they could run any number of trains and get people anywhere in the resort without requiring a transfer to a different route or a different mode of transportation at all.
For example, imagine the monorail beams of the Epcot loop have been extended southwartd along World Drive as far as the area around the Wide world of Sports. there is another beamway built along Osceola Parkway between Animal Kingdom Lodge and Pop Century (including a stop at Animal Kingdom among other things. Imagine you are at AK and want to get to MK. you board a monorail at AK and it travels along the Osceola beamway and automatically transfers to the extended world Drive beamway without requiring you to transfer. It then travels north along World Drive to the TTC, switches beans again to the MK loop and bingo, you're at the MK without once leaving the train you boarded at AK.
If there's a way to handle track switches afely while having guests on board the monorails, the monorail beams don't have to be loops at all. that would make the entire system a lot more flexible and more efficient. It's just like building roads, just elevated and with big trains instead of cars and buses.
adding all of these spur routes and eveloping a much safer system would take some time and a great deal of money, though, so this whole thing is probably cost-rpohibitive, sadly.