I said it when they started the rebuild... if they just try to retell the movie... it's gonna suck. They did, and it does.
Disney had the opportunity to use the Nemo 'universe' and characters, and blend them into the setting that was the DL lagoon and tell an enjoyable, new story. Instead, they shoehorned the movie into the ride.. giving people nothing more then what they knew before they got in line. Hence, a waste.
How many people go out of their way to ride Nemo every visit??