The advantage of the multiple fiber cable is not so much throughput (it has an NA of 0.5) but it has a really small minimum bend radius of like 2mm. You can not get (or I couldn't find it) the 600 fiber in small lengths but you can get the 217 fiber stuff in meter quantities.
We just got back from a month in Milne Bay. Great fun (we have been several times). We were on Rob Van Der Loos's boat the Chertan (he built Tawali but no longer owns it). Great place for little things (nudis, shrimps, crabs etc.) with some additional Wobbegong and Mantas for the big side. We have also dived with Alan on the Febrina, a great boat depending on where you want to go in PNG. We have not been to Walindi but hear good things about it.
We agree, Triton Bay Divers is an excellent place to go diving. We spent a month there in Nov 16 and two weeks there in January 17 and are going back in January again for two weeks. The first month was with Graham Abbott (diving 4 images) and Lisa was there, the second trip Jimmy was there. On the second trip, Conservation International was there tagging whale sharks which were able to observe. Neat. Here is a movie of the two trips kind of combined (the first part is on the Triton Bay website)
The only thing I would add was that the food when we were there was not terribly exciting (nor very good for the first trip) and they ran out of things like eggs and milk while we were there. That being said, the place itself is terrific and all of the staff were really amazing. I hope that the new dive masters (Andi is gone, married and off to Manado I think) are as good as last years.