The entire region is aiming for a North American rebrand according to the now former director. Andean/Sloth doesn't make sense being next to sea otters and skunks (and others in the future). You could argue that sea otters don't need to be part of it to avoid a North America theme, but the old polar bear expansion habitat looks like it was built for them - so they didn't have to change things too much to the exhibit itself.
The animal and guest spaces are now complete, and it looks fantastic, especially since foliage was given the chance to grow. As an added bonus, the addition of Bear Ridge and Sea Otter Coast means the zoo now has two more spaces for rescues.