A basis for simulation mode has been started as the map mode, you can run it by launching the game as "rwr_game.exe map" in 0.3. Currently there are no soldiers in the field in that mode and it's a bit buggy in several ways but you can wander around the map with the camera. The camera is leveled slightly higher than in the usual game (it breaks the illusion with the bushes and tree vegetation, that's one of the bugs).
It could be extended like you said, allow AI fight each other and adding and removing soldiers and controlling various things, eventually being able to edit the map and terrain directly. Don't expect it to happen too soon, but it's a good idea

The win/lose situation has been discussed also in another thread recently, and I suggested airborne forces that would be dropped around the map occasionally if one nation runs out of bases. Implementation-wise the airborne forces would be an easier solution than the camps.