Looks really good! Yes, submerge the water dish a bit more so he can climb in and out more easily.
How about a small Spider plant in a pot, submerged in the substrate?
We got both of our tortoises little kong toys. My russian has a traditional tiny kong and my marginated has a kong tire. They both seem to push them around a bit, and they add something different.
I also have a rock course in each cage.