Very nice map indeed.
I noticed the pk3 size is very big, and this is due to the 16MB .tga files... Perhaps it would be best to supply a copy for use elsewhere with the .tga's intact, and another pk3 for servers, using smaller .jpg (you can split the alpha channel into a separate texture, named texturename_alpha.jpg).
Not sure if generating cubemaps for control points can be done automatically, but I am not even sure how the current cubemaps are generated, so it's possible. Just need to find someone with experience.