Sorry, didnt do it for me. No plot...boring narration and thought the footage was OK, not great. My kids felt the same way
Just got back from seeing it, thoroughly enjoyed it, and recommended it to my non-diving sister. Then get on SB and see this.
Everyone's entitled to their opinion about what they want to spend their time and money on, so by definition, you're not wrong.
But life doesn't have a plot. I'm way over-tired of some screenwriter's idea of synthetic good and bad guys, and building and releasing of manufactured tension. I don't need that to hold my interest, in fact, it's usually a turn-off.
The photography was very good, the subject is fascinating, and the narration, music, and eco-message didn't get in the way too much. And it's real. Not quite the same experience as diving, but the same goal, and in some places I'm never going to actually get to. I loved it.