I've played on that very test server, it actually wasn't as bad as you might think. That probably being because the server wasn't up for very long and it was mostly people walking around on it, not anyone really building stuff there. I remember some beautiful, wide meadows on smoothly rolling hills, endless olive forests and , to be honest, that's it already.
By the way, you got some of your units wrong. Xanadu borders are 32km each(normal servers are have 8km borders) and the borders of that test server were 64km each.