If you saw animals over on Sunset Savanna, that is a change from early September when I was there. There were signs in the Sunset Overlook saying that the Sunset Savanna was closed and that the animals had been relocated to the Arusha & Uzima Savannas. I could see the Kidini Village construction from there, so I assumed that while construction was going on, the animals had been relocated.
It also seemed that the Zebra & Giraffe Trail rooms were more occupied by guests than the Ostrich & Kudu Trail rooms, because when we checked out the Sunset Overlook & Arusha Rock Savanna Overlooks at night, we saw few lights on in the rooms.
Perhaps my observations were off-base...