I too, would like to see bot support integrated into FS.
The biggest problem with supporting an active mod will be map changes breaking the AI between releases. With Navmeshing being the most time consuming part of bot support process, we aren't going to want to spend a lot of time doing the navmeshes and then have to redo them every time the maps change in a new release. I have been thinking of how to keep the bot support intact between releases.
One idea is to create alternate versions of the maps dedicated to bot support. This will make it easy to modify the maps as needed to enhance bot support and be able to maintain bot support in the mod while work continues on enhancing the multiplayer experience.
The biggest improvement with bots in BF2 and BF2142 is the ability to move through a 3d environment. Bots can now use multiple levels of buildings and go up and down stairways. This is done by creating a 3d navigation mesh that guides the bots through the map.