To me, sharing a bus between Swan, Dolphin, Yacht, Beach, and Boardwalk isn’t as bad as the 4 stop loops at OKW, CSR, and CBR or the 5 stop loop at POFQ/POR. Maybe it’s relativity in that the Epcot deluxe resort bus route (which is often split into two seperate lines,Y and BC/S, D, BW)
is actually serving 5 different resorts and feels quicker while the mod/DVC single resort loops feel like they take forever.
There are very few one stop bus lines in WDW. Only Pop and AKL have exclusive service.
Contemporary and Poly share all their buses. WL shares either with FW or GF, depending on the line and some FW buses make two stops in FW as well.
It also has a lot to do with how much “equipment” families are traveling with, group size, and how many ECV/handicapped passengers are boarding/departing on any given bus.