It seems strange that the concept art was placed around the proposed site but no work has been started yet, my family visited over Magical Christmas and animals are still living on these sites. I doubt they will do the work over the open season, but I don't think they have time to finish this within the closed season - which means maybe these developments have been delayed.
I agree with the sentiment above, and I do think that a new Lemur House and Penguin Enclosure with the glass frontage shown on the concept art, would be extremely popular, they seem to be most popular at other Zoos. I also think it would be nice to see a small refurbishment on the Red Panda, Fishing Cat and Lynx Enclosures to make these a little less cage-like - these changes would make the zoo a much more pleasant and popular attraction. The tiger enclosure could also do with livening up, but again, given the nature of these animals it may be difficult to modify these enclosures.
I feel like other enclosures, such as the new Spider Monkey Enclosure, Gibbon and Lemur Enclosure are all okay, and the enclosures for the birds can't really be updated given the nature of these animals. But updating the more 'tired' enclosures over by the Red Pandas would be welcomed, as well as these new state-of-the-art enclosures advertised in the concept artwork around the zoo.