Can you repeat this without the alphabet soup?
I'm ex-army and even I couldn't follow most of what you said. However, if I get the general idea of your argument, my conclusion is that dedicated FS vehicles are pretty much useless and even a detriment in the game when it comes to dealing with scenarios that involve calling indirect fire on almost any kind of armor; or even RPG armed infantry if your close enough. Either your going to get your vehicle killed, or you'll never get a chance to for fire because of the vehicle AI's protective behavior. It's a realistic reflection of what happens in the real world, but also an inadvertent counter point to a "feature" touted by the game designers.
If that's the case our FS vehicles, at least in these situations, revert back to being personnel carriers with sophisticated optics that are useful in a) getting our forward observers to good observations points, and giving us a slight edge in being the first to spot advancing armor under the right conditions. Their built in behind the scenes bonuses to FS spotters are not really applicable because of practical employment considerations.