There is only one pool at the POFQ. And, yes it can get crowded. However, the middle of November is a pretty slow time so that may not be the case.
Keep in mind that you can also take the bus or walk the river path down to Riverside. There they have several "quiet pools" plus the main pool. This gives you many choices.
The slide at Riverside is a bit longer and bigger than the one at FQ. However, the theming around the pool at FQ is very nice. They also have a kiddy pool there, too.
Can't compare it to the All Star pool as I haven't ever been in it. But, I don't think it will be that crowded the middle of November unless it is at Thanksgiving.