Half the thing of Nemesisisisis' story was the vagueness though. Didn't necessarily have to be explained and let the visitor make their own mind up. Subtlety is well out the window these days so guess it'll be full on Phalanx storyline then.
Not entirely sure what effects they could really add to it that would "enhance" things. Red water back would be a plus but beyond that? Nothing that would make a real difference to riders.
Though I think that the only way Merlin would approve such work would be if there was some "plussing" to the attraction.