Hi Liangness!
The island of kuramathi has 3 hotels, kuramathi village, kuramathi cottage and the blue lagoon. People who goes on honeymoon prefer to stay on the blue lagoon or on the cottage because they have much more privacy. I met a great couple from Ireland and they really loved their honeymoon on the cottage hotel, and they didn´t stay on the water bungalows!
Each hotel have a dive center, but the 3 of them are run by the Rasdhoo Divers. Each dive center has instructors and DM. Some days we shared the same boat for the dive, other days (when there is a lot of people to dive), each dive center use their own boat. So, I don´t understand the recommendation of the another operator by the Rasdhoo divers. Did they say the name of this another dive operator? Maybe it is from another island ...
In Maldives 95% of the corals are dead because of the El Nino, but there are some places that the corals are still alive. So, if I were you, and wanted to see beautiful corals, I wouldn´t miss the dive safari because they have really great sites:
Maalhoss Thila
Dhonkalo Thila
Hoholha Faru
Maaya Thila
The dives close to the island of kuramathi, don´t miss
Veligandu Thila - in january, if you are lucky, you will see mantas;
trigger fishes, barracudas, morays, snappers, ...
Veligandu North - where I swam with the dolphins!
Hope I helped you
Cheers