I like Sea World, and the area does look well landscaped, but as an attraction, this is pretty bad. We're outside, but we're also underwater? We're outside, so let's enjoy the view (snort), but also look at the screen? It just makes no sense. It's like they already knew they had to put a dress on a pig.
That said, I do think a bad dark ride is better than none at all. And will give it credit for having various speeds and a stop in the middle of the ride, that's a bit unusual.
But really to me, I'd view it as a low budget PeopleMover type attraction, and on that level, it'll do (barely). I can't imagine it'll ever have much of a line, so it also has that going for it. Points for trying. But it's certainly not going to win anyone over, so it does really make you wonder why they bothered. I think it's one of those things that looked good on paper to execs that have never been on a ride before.