Was not offered the Water villa and didnt ask about an upgrade as i wasnt keen.
The water villas have very bad heat insulation and i would not recommend staying in them till hyatt fixes them. There are about 3 full length glass windows with sunlight coming straight in. The a/c can only cool the room down to 28 deg.

Even in the beach villas, the temperature in the day remains at around 24 deg with the a/c at full blast and privacy screens drawn.