Well... I know the "aquarium viewing" doesn't work like they promoted due to the Tram route street lights.
If you remember, the light/water was supposed to change with weather/day-night. Ever wonder why you ride it at night, but still looks like daylight underwater? This is due to a sensor being near a street light which prevents the "nighttime mode effect". I can't remember if the "rain" effect happened or not (it's supposed look like it's raining on top of the water if it's raining for real).
It's a simple fix, but as far as I know, they never fixed this highly promoted gimmick before reopening the ride.