I'm not sure how much the actual enclosure has changed (it's not an exhibit I've ever spent much time at - sorry ape fans!) but the building around it has changed quite a bit - the entrance area and crocodile enclosure have been completely re-done and the whole place feels much more light and airy.
I suspect not at all- it looks the same as it did before- also the Chimps will have had to be living in it while the outdoor area has been redone too.
As someone(FG?) commented on your outdoor photo, I wish they would cover the outdoor Orangutan enclosure like the new Chimp outdoors. This looks at least as suitable for Orangutans, far more so than the current 'Forest'.
