The biggest change that was made to the Arizona Biltmore Hotel was the addition of this new outside bar. You can't tell from this photo that it is surrounded by a water filled moat making the bar look like it's on an island.
Directly behind where I was standing to take the first photo is this new pool area. This new pool has been designated the "adult" pool while the old pool is now the family pool. All of this has been added to the large open space that used to separate the main hotel from the other buildings where rooms are located. I posted some photos from this area a couple of years ago when I had the opportunity to spend a weekend here.