None of the value resorts have water slides; that's a "perk" of upgrading to moderate or deluxe. Pop does have a fun Hippy Dippy pool that has oversized flowers that spray water. I think the bowling pin pool and one other (I think it's a computer-theme) are basic pools, but my DD had a great time at the bowling pin pool anyway. There is a water play area, but it is not at the pool.
Pool-hopping is not allowed except between "sister resorts" and while there was speculation that Pop and AoA would be sister resorts because of the bridge between, that has not turned out to be the case.