I wouldnt change much it looks amazing! If anything maybe add some smaller sticks since you have all large branches and ropes. And id remove the water fall features, the resuvoir becomes a bacteria cess pool. Mistings systems and drippers are great, waterfalls and fountains not so much.
Looking good! My personal suggestion (in addition to Clover's) would be to consider removing a few, if not all, of your ropes. Sisal can be very scratchy and irritating on little feet! It can also harbor bacterial growth, though it's not nearly as bad as cotton rope for that. I'd recommend some sort of vine instead, such as those by Exo Terra/Flukers/etc.