I was there at the end of February this year. Basically it's exactly what the above folks said. Disney is really making an effort to improve the bus service, especially first thing in the morning at the resorts. They have a dispatcher working the resort stop in the morning and this person will deploy extra buses as needed, on the spot! So if the thundering herd all of a sudden shows up for, let's say Epcot, the dispatcher will see that and radio for an additional bus from a holding area not too far from the resort.
We split a bus with POR only in the mid day with POFQ always being the first stop. Usually, if a bus back to the resorts from the parks is shared, POFQ is the first stop for drop off..... but once our driver had a big crowd from POR so he went there first and dropped the big load there, then he went to POFQ.
On occasion, especially later in the day we did take the POR bus loop before heading off to a park but it wasn't a huge time commitment, like when the bus would go from the Wilderness Lodge all the way over to Ft. Wilderness and then over to the parks.
All in all, I am seeing Disney get
smarter when deploying the buses TO the parks.
The bus from ANY resort to Downtown Disney AND BACK is still the black hole of wasted bus time. One day when the weather was exceptionally windy they shut down the boats and we HAD to take the bus from POFQ to DTD (and back to the resort!).
I couldn't help but think that if perhaps they had a Margarita machine in the back of the DTD bus if that wouldn't make the ride more bearable...
~NM