I think the density looks pretty good, maybe a little too much though, in my personal opinion. My umbrella tree was a bit dense and I found my panther would avoid the dense areas entirely since he couldn't easily walk through the leaves/vines. Once I pruned the branches a bit he would roam those areas more.
As long as you provide areas for him hide, and get away from basking/UVB I think that is fine, the entire cage doesn't need to be a hiding place.
Here's my setup
View attachment 265263