I like the way it is now as well. We have never had a problem at the moderate or deluxe resorts. If they put in structured lines, that would make it difficult for people like me that need to sit while waiting. It would mean that everyone would always be ahead of us when getting on the bus, regardless of when they arrive. It isn't always a 'choice' to sit. What it would probably mean is that I would be forced to get an ECV, which I try hard not to do. As much as possible, I use a cane or a walker. Using an ECV would mean fewer seats for others to use and a delay for everyone else boarding the bus. As long as I can sit while waiting and then move to stand in line as the bus approaches, I can manage. I do not want to use an ECV until it is absolutely necessary. Standing for long periods is impossible for me, so using the buses from value resorts has become a thing of the past for us. I would find it difficult to see the same system at deluxe and moderate resorts.
One place that they have a roped line at the deluxe resorts is for waiting for the boat at the GF.
Our experience with the lines for the boat to the MK from the GF:
AT one time there was no line and people proceeded to the boat when it arrived. Needing to sit did not put you at a particular disadvantage and people seemed to watch for who arrived first and board courteously in a reasonable order. Nowadays, regardless of the fact that we are the first waiting for the boat, later arrivals that are able to stand wait in the queue area. They then board first even though it is clear that we have been waiting prior to their arrival, so that we are always last on board. Not a big deal usually, but we often don't get a seat together and if there are too many to get on the boat we can miss our chance to get on board for more than one boat. When the monorail isn't running, that is sometimes a problem for us.
We have considered one of us waiting in line while I sit, but DH has bad hips as well, so, although he can wait in line, it does cause him some pain to do so. Also, many people apparently consider a person joining another in line as cutting in line, so I would feel very badly about trying to do that.
I REALLY hope that they do not put structured queues everywhere at all the resorts.