I thought it was really good, both in their fate (fitting end for them) and execution.
I loved the dancing, the reference to their introduction promo, the fairytale metaphor and the fact is, people can and do drown in swimming pools (it's why hotels close them after certain times and usually ban lone swimming), especially if under the influence of drink or drugs and clothing can weigh you down and impede your limbs from working properly to swim.
I know there will be fans who think it is the wrong thing to do, that's understandable if they are favourites, and future producers may well resent that they can't return, but I think it is a good call.