I've tried several things to add some topographical variety, but scale keeps getting in the way. For example, if you scale the map up so that the buttresses are large enough to redo as buildings you end up with a map that is way too big for any mode of TF2. I'll play with this some more, probably starting with a gentle displacement on the ground. How much I'll play with it depends on how much it is played.
One thing I'd LOVE to do for the spectator mode giggles - replicate the scoreboard as seen from top down.