And, ultimately, that's the rub, isn't it?
If you want to make a less-than-laserguided bombsight work, you need to make target-rich areas, but if you do that, you'll take a frame rate hit.
The idea is, a single buff couldn't shut down a field for very long if there were plenty of things that needed blowing up. But if there were plenty of things that need blowing up, a single buff's FE wouldn't handle the hit.
Then again, a field with simple polygons and object density approaching that in the cities might do the trick.
I for one would get in a buff more often just for the joy of crushing mustangs on the ground.