I think what people should be complaining about is the fact that
1. The thlassotherapy pool is poorly placed on the M-Class ships in the first place.... and that it pales in comparison with the t-pools on the Century-class ships.....and
2. They should have a regular swimming pool!!!!! with a magadrome cover for cruises in cooler climes... or even for those odd rainy days. Ships 30 years old have magadrome covers for pete's sakes!!!!!