I really have to disagree about that. SeaWorld has made some really good dark rides in the past--just look at Curse of DarKastle or Battle for Eire. Journey to Atlantis (the Orlando version) had excellent dark ride elements before they ripped out the existing storyline and didn't implement the new one (which was going to tie in with Kraken Unleashed).
While I can't comment on Battle for Eire since I haven't been on it. Yes, Curse of DarKastle and Journey to Atlantis were nice darkrides when they opened...but that was in the past. You look at them now, CoDK is closed and JtA was recently botched. Both around the same time period when a disaster of a Submarine ride was made and quickly closed. Their recent track record really hasn't been good, especially with what's happened to honestly their two best ones.
^Exactly, Antarctica would not be a bad ride if it was located anywhere except Orlando. It is much better than any dark ride we have in the UK.
Antarctica doesn't stand up to Hex at Alton Towers, nor Valhalla at Blackpool. It doesn't even have the homey charm of Over the Hill at Adventure Island.
As others have mentioned, the ride of Antarctica is sadly a waste. They could've had a slam dunk of a family ride, they just didn't take advantage of anything for it.