Has anyone ever seen a bus stop at any park after closing that didn't have a line?

At least POFQ you know you'll be off first. Also, POFQ has its own bus stop at MK in the evening. It used to have its own at MGM too. I would never would choose a resort because of the bus service. I have yet to find one that would measure up in my book, yet. But I'd still rather let Disney do the driving than me.
As far as CSR being centrally located, that's depends on what you are really talking about. It's between AK and MGM. I don't know how that makes it centrally located. The quickest moderate resort to get to from MGM is POFQ. Don't believe me, check out
www.ourlaughingplace.com . PO is right across the street from Epcot, though the road access doesn't look like it. But Disney designed it that way. Yes, the boat to DTD is slow. That's what makes it so much fun. There's also a bus that goes to DTD.