This is just at temporary terrarium that I set up until this frog is large enough to go in my 40 gal terrarium with my other white's TF. However it is hiding most of the time which would back up your suggestions for more trees and cover. I'll have to add some larger plants.
It was really shy when I first put it in the new viv, but it murdered 6 or 7 crickets right off the bat and that's always a good sign!