Hey there, I know that these posts were made about a year ago but I'm interested in the same topic.
I have been using AF-S but have mainly shooting corals or macro. I don't seem to have much luck with sharks, fish or anything moving. They never seem to be in focus.
I like the idea of tracking for these subjects but its a pain underwater to switch between AF-S and AF-C. So....BBF seems to be an answer.
I had some trouble getting BBF to work in the desired way and will keep looking into it but I wondered if it is because, , I only use LiveView when underwater.
So, the question is whether the use of LiveView affects the use of BBF