I think it is a real criticism of the zoo management and their design philosophy that they haven't even put up a notice by the viewing windows for the Bornean orangs - of course if they did, it would slow the flow of visitors through RotRA even more than the design of the building does now. But the opportunity to do so some real public education is being wasted.
I agree, there are no signs at all about the individual orangs like there were in the old house, and no notices about the babies. This is a shame when you consider what an achievement it is to have all 4 females of reproductive age (not counting Martha