It's already there,in the arena settings,however we have tried many times to get the damage to the level of the MA and shorten the rebuild times but there were several issues that cropped up and we just couldnt get it to work properly.
I could easi;y set the setting the same as the MA but that wouldnt be conducive to training as too much time would be wasted re-upping in new planes.
As it is now in the TA if you see a bomb crater you missed,if you dont then you hit a target!
It's a good wish and I would like to see it happen but unfortunately unless someone can figure out a work around on the other issues I dont see it happening soon.