That's an excellent point that I had not thought of. Especially now that all the female impalas have moved to the new Impala Plains, it leaves just the male impala, the 3 gazelles (which I thought were supposed to be in Impala Pains as well?), the Ground Hornbills, and Cinereous Vultures. With the majority of those animals being birds, they don't really need the large yard. Even if a new hippo beach only took up 1/3 of impala country there'd still be enough room for all animals.Either way, utilizing impala country would have made a huge difference.
As for the bland concrete above the underwater viewing widows, I honestly thought the guests wouldn't be able to see the exhibit from that angle, but that's not the case. Maybe they'll add something to it as finishing touches?
The exhibit looks nice, but as pointed out, there is a lot of potential to be better. That is disappointing to see for the second new exhibit in a row.