Thanks man. Well, Its still uncertain when the heavywork will start, but Im thinking in some 2 years max. Until than.. you can stay tuned on the dev. blog cas' not much media will be released but there:
You're awesome man. Your maps, it's just very cool. Where do you find all those cool custom materials and models. Can you please give me link of some really good materials and models(it doesn't need to be on gamebanana)?
Sorry it's taken 4 months to get back to you on your question.
The navigation mesh does not move. It is solid.
You might want to try to delete all the nav mesh on the escalator stairs and then "mark" the top of the escalator then do a "nav_splice" to the bottom.
At that point try a "no jump" command.
The Nav mesh is not part of the map file, so feel free to upload it to a site and tell servers to DL from there. Your map will still work.