It's a difficult image, but I thought it was important. Thinking about it, it makes sense to remove his sign quickly, as they won't want to misrepresent who is in the enclosure, but it might have been nice to have a sign explaining why there isn't a silverback at present. Kumbuka had a big fanbase, especially after the Ribena incident. I can predict that for the next few years, until a new silverback can be safely introduced, whichever is the largest gorilla visible at any given moment will be 'daddy gorilla'
Yes, it does him a disservice to obliterate all mention of him apart from his name on Alika's and Gernot's signs. I'm sure you're right about 'that's the daddy one'