Our DD liked the Villa pool cause it had a large set of steps down into it. It covers almost the whole side of the pool. She got used to walking around in the water without holding on to us that way. It was nice, and it also bubbles!
In the article about the WLV in the Vacation Magic I recieved, it calls the WLV pool an "alternative" to the main pool. So we are definitly able to use the main pool.
you can use the main pool, but in early Feb. we found the villas pool to be way less crowded than the main pool. Frankly, the main pool was a zoo. And the villa pool is really decent size pool.