The architects were the dan pearlman Group.
But I think that their brief from the zoo included the relatively limited indoor viewing of the orang areas in the Monsoon Forest. I think that was a deliberate choice because of the way that the hand-reared females came right up to the windows in RotRA, spending long periods interacting with visitors, which caused crowds to gather around those windows and hindered visitor movement through the building. Emma and Subis can still approach the windows in the Monsoon Forest, but rarely do so, and they cannot stay there comfortably. I agree that this limited indoor viewing can be frustrating for visitors, but I am sure that it benefits the animals, and the outdoor viewing in Islands is far better than in RotRA.
I agree. The remodelled vivarium exhibits in the 'Field Station' now give significantly better access to the orang viewing windows and a lot of the 'stage set' stuff has gone. I think that reversing the one-way system, so the orangs are now at the far end of the Monsoon Forest, may have had some effect too.
This is what it used to look like soon after it opened in 2015. I'm afraid I don't have a photo of the same area now, but I assure you it's much better.