Let's try to analyze together some unused Valve maps (and maybe some unknown community maps) and find the problems they have and how we could solve them.
I'd like to start from coldfront/wormfront/warmerfront.
http://i.imgur.com/jVJDsPS.jpg
At a first sight i see a veeeeery long map that lacks of a real choke points between 2nd and 3rd.
While the middle point is quite perfect, i think the second one is the real problem. That's why i'd probably move it on the outside steel bridge making it more difficult to reach from mid adding chockes with some kind of building in the middle (like gully).
Last point shouldn't be much a problem; maybe it is a lil bit large and with a low roof...
That's a quick draft i made (maybe it's too much ambitious with that flip of half of the map...)
http://i.imgur.com/RZj0Jcd.jpg
What do you think? Would it be enough? Is it a too drastic solution?
Let's keep alive this discussion!