Agreed... Waterparks were all the rage in the 80's and eay 90s...
But tastes have changed as there are more local/regional attractions offering similar or better than pools and plunges. (Not to mention liability from the business side)
Sea world has paced the field here... As not only did they pioneer the water coaster... But discovery cove and aquatica were groundbreaking and successful.
The Roberts over at Comcast could capture some of that synergy and use it to their advantage.
Innovation...you know... That could result in successes and profits if you bother to do it