I was just there April 9-17th and there was absolutely no rhyme or reason to how the buses picked up or dropped off.
Sometimes it would have already been to POFQ and then would come to South Depot (lobby) and then go around to West and so forth.
Othertimes, would do POR and then go to POFQ.
Seemed that regardless of whether had been to POFQ yet or not, always picked up first at South and then around to others.
Same thing on way back from various parks. Some parks have combined bus for POR/POFQ, while others have individual buses. MK has individual buses, I can't remember how other parks were set up.............
Sometimes dropped off South first and other times dropped off West.
Really depends on which park you are coming from.
I think West is closer to entrance into resort from MK, whereas, South depot is closer if you are coming from say AK, Epcot and HS.
I recommend South or West for p/u!
Otherwords, it wasn't consistant any way you look at it.