Both the pool at Tower 4 and the main pool were uncrowded during most of our stay (5/15-5/21). Escudos is at the Tower 4 pool, with a full bar, snacks and sandwiches, and live entertainment at certain times.
We didn't use the pool at Tower 2, but it looked pretty uncrowded. The pools at Towers 5 and 6 (Pirate Pool) were definitely crowded, but not unbearable.