Have you considered from a Marketing perspective, maybe the Worlds first is what's needed to get an article within the Daily Mail, and to build up some excitement around the attraction. If I had a zoo with a USP I would want to shout about it and I am really looking forward to the expansion!
Some other examples include:
Six Flags: https://www.youtube.com/watch?v=lH4ThJn8HEk
Europa Park: https://www.europapark.de/en/food-drink/foodloop-first-looping-restaurant-worldwide