Looks good, but dont make the polys to small, otherwise it will bounce from time to time, which is really annoying, especially if its a harder map. And I really like your images, with the difficulty-area marking. You made some thoughts on it I think. Keep going with good maps like that! I'll upload them to my server.
PS: A side-note to you and all the other great map-makers: If you're going to make more maps, bundle them from time to time into one big pack, dont create a new thread for every map, because its really awkward to download every single archive, extract it and upload it to the server again. With one big "pack" it would be much easyier to do.