Currently a huge amount of underutilized space with only a few Impala, Grevy zebra, White rhino, Ostrich and some geese. Giraffe should come back soon, but there are still a lot more possibilities to make something out of this....
The zoo map and website are in German, so I can't make out most of what is going on, but I the blank spot on the map in the savanna area. Are they building new giraffe and elephant exhibits? You mentioned that the giraffes are currently gone and the website is advertising some kind of campaign for the elephants.