Hi Ed, mmmmm.... not to bad I think.
Yes it is just and oval and I'm not to sure what kind of scenery you planning, but I have found with my layout, the spectators like tunnels, mountains and bridges. I know you said you want it flat, but I would really try to raise the one side a bit. Make it small, no need to make it big. Just have it there.
But at the end, this is just my 2cents

It is your layout and your ideas. And you must like running the trains on it.
Cheers, Evert.