Transportation convenience is in the eye of the beholder. I will take a bus pulling up to the AKL and going straight to a park anyday, over a bus making multiple stops at other resorts then going to the park or walking to Epcot in the heat of the summer or the middle of a severe thunderstorm.
No resort is close to every park, certainly some are closer to one or two parks but sometimes actually how close they are (in the amount of time it takes to get from your room to the park) is lost on those that can "see" a park.
There are many things I consider when chosing a resort at Disney, transportation is not of them.
For example we were staying at the Polynesian, friends at All Star. We called each other from our rooms and said to meet at Casey's on Main Street, hung up and left to go to the MK.
We had to walk from our outer building near the beach to the main building and just as we arrived the monorail was pulling away, so we had to wait for the next train. Once loaded we had to wait on the track in between the Grand Floridian and the MK before pulling into the station. The train was full, lots of strollers moving slowly,

and we slowly made our way into the park with the masses.
My friend left his room at All Star and walked directly to the bus stop which was very close to his room, just as the MK bus pulled up, he got on and went directly to the park. His bus was not crowded and he quickly exited and went to Casey's to sit down and "wait" for us coming from our monorail resort.
Point being, you can never be sure who will get somewhere sooner regardless of where they stay.