Hi. I don't know that I have much useful information for you, but at least I will be bumping this up for you (I hate it when noone answers my posts). In terms of making requests when you book, I would say you could try but are not guaranteed anything. I think it is really more dependent on what day/time you check in and what is available.
They are willing to work with you when you check in, however, so you may want to decide what your priorities are: building, floor, parking lot or pool view, kids room theme. I think in terms of buildings, 7 and 8 are the closest to the lobby (I would double check that, though). First floor may be a little noisy, top floors I have heard the elevators are very slow. We had the second floor and it was perfect. If there was a wait for the elevator, we just walked up. We chose parking lot view so it was easier to get to our car, I think they may charge extra for pool view, too.
We had the Disney themed suite and it was beautiful, but I think this trip the theme would be lower on our list of priorities, and the location higher. Good luck!