It's not a problem of "whether it could" but a problem of "whether it should".
We already got a three-buff formation, and a boatload of blindly patriotic geeks in each country, who will stop at nothing to keep bringing in the 'charge of the heavy brigade', until the target is finally annihilated.
Boy that'd be fun - a single passing lanc formation which obliterates everything in the town at a single pass.. and the M3 merrily walks in for capture. Just thinking about all the wonderful milk-runs and NOE runs with that crap makes my skin crawl.