Very nice. I'm a big fan of more branches and leaves up high.
Your white love to climb and they also like to hide up high to sleep so adding something to get behind such as leaves will give them a place of security.... you can see them but they think they are hidden.

You can also just add a nice Bromeliad in there and they will love you for it.

Check out my photo albums and you'll see what I mean.

Nice viv though and they should definitely be happy there.