Hey there,
Great advice has already been given, but wanted to add that I also own this enclosure, two in fact! One's for a snake, though, so I'll refer to the one the dragon is in :lol:
I left the styrofoam wall for my dragon as he really enjoyed it and used it a lot to reach his basking spot as a baby, but this wall is terrible to have with insects, as mentioned, especially dubia roaches. Once a roach gets behind there, it isn't coming out. Crickets I noticed would come out to try and eat from the salad bowl where I'd be able to remove them or offer them to the dragon again to eat. During full tank cleanings I would move the wall, collect all the roaches that got back there (they always were alive, thankfully!) and put it back, only to have bugs get under/behind it the next feeding... I removed it about a month or so ago.
I did want to comment on the screen though. I personally hate the design of this screen. It makes lighting placement very restrictive, and a large dome cannot sit flat on it. If you end up hating it as well, I just use this generic one:
https://www.amazon.com/Zilla-Reptile-Terrarium-Covers-36x18-inch/dp/B000QFQ30K
It doesn't lock in place, is a little too big, but it works for my situation.
I would take into consideration Cooper's recommendations.
Other than that, more items to crawl around and explore would be great additions. You can add things you find outside after once sanitizing it (you can "bake" wooden items in the oven for 30-45 mins to kill off nasties.)