If you have the space fill it !!!
We always stress our Balls like to "Hide" I see nothing but ample space to hide in this set up.
My Normal has 2 Hides (Hot & Cool) and One in the centre, Guess where he is now and has been for the last 24 hours, Under His water bowl !!!
I was feeding my Lesser in his tank QT reasons I remove nothing, Most times ( I know where he is hiding) I dangle the food in front and he'll stick his head out and nail it !