When we were there in 2013, there was a heated pool and an unheated pool.
They called the unheated one, the Canadian pool.
This was before the big storm.
Hey, I resemble that comment. And swam in that pool. I AM Canadian...
We were there in March '11 IIRC. I don't think the pools were heated at all as they cascaded into each other. The last pool in the chain (nearest the beach) was the warmest of the 3 levels and was swimmable in March.
The plunge pool on our balcony was always ice cold. I think they may have refilled it each day while we were out? It was cold even for our thick Canadian hides.
The resort was pretty full when we were there, but not a lot of activities in the resort. No problem grabbing a lounger poolside, or just hang out on the balcony with some home-made margaritas. Tons to do outside. Whale watching was incredible, X-rails in the desert, and lots of walks into town for dining and galleries/shopping. Had a small rental car too for getting around further afield (trips to Cabo San Lucas mostly).