Since the Battlefront system allows for units to be reintroduced in the game after being eliminated, it basically simulates what you are asking for. That is, if I own a gun battery that has been eliminated after a counter-battery action, I may be able to reinsert it in the map through an OMA. That simulates the disruption in command and control and unit organization that would have suffered. It all depends if the unit have been tagged through the editor with the capability of being reintroduced (once or more times)
This is true, although, I haven't seen any artillery units that have more than one "life". It can be modified in the editor as you say, but, before doing/modifying this, keep in mind that you get VPs for the unit everytime it dies... could be more costly than usual.
The idea expressed above is an interesting one. Although the game does not use OP points to fire, would be interesting to see attack "bullets" reduced in some manner to simulate the disruption result that you're looking for rather than an outright KIA.