We stayed at the Aura a couple of years ago and were not disappointed in any way. We were upgraded to a ground floor room on the serpentine pool and could step out our door onto a small patio and into the water. A couple of times at dinner, my wife asked for two lobster tails and were given no problem. We had great staff, great room and great food. I'd say it was the nicest place I have stayed in Coz. If a person were not happy at the Aura, not sure what I recommend.
We have also stayed at the Allegro 3-4 times, at the Occidental 3-4 times and I have stayed at the Casa del Mar. I have had no issues with the rooms or food or staff at either the Allegro or Occidental. Enjoyed the beach at both. Not sure I really care about the room decor when I'm on a dive trip. And we do enjoy the garden areas (jungle?) and critters at the Occidental. That is part of what we want when we travel. Had to laugh at the iguanas at the pools at the Occidental, amazing critters.