Why on earth would they want to add to the misery of this yard?
I'd be the first to say it's not great, but "misery" seems a bit strong. It's not really any worse than London, Dudley, Noah's Ark or (possibly) Whipsnade's in terms of size (though I admit the others, with the probable exception, of Noah's look better).
The Sea Lion Pool though? That's another matter.......