As I write, I'm only 13 days and 21 pages behind on the thread - that's as close to being caught up as I've ever been. (Thank goodness, the thread seems to be slowing down just a bit at the moment.)
Anyway, back around 8/23, there was a discussion about transportation - mostly about the buses. I'm one of those folks who actually hangs out on the Transportation board here at DIS, so I hope what I've read is true.
As I understand it, the individual resorts contract their transportation services with the Transportation department. (Remember, at WDW, each entity has its own financial status and has to report its own profits and losses, even though it's all "Disney" to most guests.) So when resorts share buses, it's because at those times of day the resorts have pooled their financial resources to save on costs.
It's especially frustrating when resorts are sharing buses at park opening and, to a lesser extent, closing. (Because the closings are usually staggered at slightly different hours, it has less impact than it does when three or four parks are all opening at 9.) At those hours, you may be running into the additional constraint that there are only so many buses to go around, so the cost to the resort of adding additional dedicated buses may require them to essentially bid against one another.
The other question that came up was about the heat of the Friendship boats to and from the Studios. Part one of that answer is quite simple - the air conditioning units in those boats are broken (all of them?), and someone decided years ago to make the air conditioning more efficient by modifying the windows so they would not open, keeping the cool air in and the hot air out. Once the air conditioning stops working, that decision creates big problems, as we have seen. Filled with people, those boats turn into a sauna inside. (If you can, try to get a spot outside on the back, or near the back door, which provides a little relief.)
The obvious question is "why don't they fix the air conditioning units?" On that one, there are any number of answers, and I have no idea which is true. The least satisfying one is "they don't want to spend the money". If that's true, then the resorts bear some share of responsibility for not insisting that Transportation provide an acceptable service to the clients on whose behalf they have contracted the service.
Other answers are less infuriating, but they don't make the heat in the boats any easier to bear. Some save suggested that there are state environmental regulations that are holding up the repair, that repair would actually require replacement with new units that are too heavy for the boats' roof to support.
All of this comes with a caveat - these are things I have not learned first-hand, but all of them are at least plausible.
And, for the record - staying at Yacht Club 9/16-9/19, then moving over to The Sandwich for four more nights.