This might be a good/great show... it might increase nightly profits. But a central lagoon is a focus point for a second for all, if for no other reason than to rest the eye. Water is a classic respite for clarity and peace; to calm one down and turn back and enjoy the mind overload and fun of a theme park. Even for a second, it does work.
I have enjoyed many watching and pointing out the large carp swimming in the water, or the long gone soft-shell turtle swimming under the temporary potter bridge. I am not being a nature freak here... but observer of human nature.
So, the show towers do defeat the lagoon far more than the domes did, even though the domes did as well. So,
I would rather that UC and Uni strike the fireworks bunker land, and move it off property. Build a huge lagoon there, build a canal from the show lagoon, and get creative on how they introduce a lagoon show in the afternoons. Only 5-10 million at most.