The renderer backend is limited by lowest common denominator in regards to hardware. That is to say some of the mobile devices out there don't have driver support for anything greater than OpenGL ES 2.0. There are plans however to rewrite the renderer to 3.0 while the current 2.0 renderer will remain maintained(at least for a while longer far as I know) for compatibility.
I guess this would relate to the "Depth of detail" point in your post. I haven't really taken a look at the networking still, I just don't need it yet myself.
