Note one of the issues that I know the mapmakers for this mod have struggled with: the urge to make the terrain, etc., huge. When working with a mech model as a scale, to make things of a "normal" relative proportion makes them huge. What you wind up having, though, is an issue where from the player perspective your mech doesn't really feel all that big. In the examples above, you wouldn't necessarily have to remove/rescale all/most of your buildings, but at the very least you'd need to populate the rest of it with a large number of smaller, more normal sized buildings like a real city - even in the future - is likely to have. This is what will also force the in-fighting people are looking for, as the people who are asking for these maps almost certainly want to feel like they are walking in a mech through a futuristic version of the big city nearest to them. Numerous 100m to 200m tall "modern" skyscrapers, and a large number of traditional height buildings less than 100m tall forming the majority of the city streets and blocks. This creates rolling canyons of building tops for mechs to shoot over, alleys they can shoot down but not fit through, etc., etc., etc.. You've got a decent start there, but you really need to keep human scale, not mech scale in mind, so that when you're in a mech you really feel like you're riding high in a big honking walking war machine, not a tiny tin can in a massive metal termite mound.
One of the reasons the devs and everyone says "start modeling" in response to a request for an urban map is that as a team looking to do a proper release, they aren't planning on doing any half-rendered maps. I don't discourage you from doing what you're doing there and wish you success in your project, but for the poster who queried "why not", it's a matter of pride to produce something polished and gleaming and new, and this really is still a beta, guys. It's so beta it's almost an alpha, but the community had been kicking and screaming and whining and begging for so long that they finally got the beta they couldn't live without. Great things are yet to come in this mods development, and if you had any idea of the scale and scope of what they've overcome thus far to get it working, you'd be astounded, as well as looking forward to see what they do in the next year or two. Besides, given the volume and intensity of the posting on the maps that came in the beta as it was, I can't imagine the complaints and insults that would have come up had the team actually released the game with a map in a Tron-like state.