We just booked our trip for the end of Oct/early Nov.

in a POR standard room.
At the time of booking I requested AB, 1st floor. Now that I'm looking into it, I realize that I'd like to add on specific buildings to be closer to the main pool. Should I call now or wait until closer in to make my request more specific?
I see building 14 is considered a prime location. But should I just request building 14 or give a few backup choices too? I think we'd be happy with 15, 16, 18 or 27 too from what I've read on here. Our prime interests are proximity to the main pool and distance to a bus stop. My kids prefer the main pool (with the slide

) over one of the quiet pools.
ETA: Forgot to mention that I had to do a split reservation of 3 days and 2 days to save some money on the reservation (30% pin code for 3 days and
AAA discount for 2 days). We want to maximize our chances of being able to stay in the same room for the whole 5 days. So maybe building 14 wouldn't be our best option since it is probably in high demand?
Thanks for any advice.