im allowed to hope, am i not? :-)
maybe restrict allied factions to 1 endgame TD 60 range each, that would be something to see :-)
Tank destroyers are reactive units. They're so common in teamgames because the maps are so lanely and heavy armour is so prevalent.
The actual way to fix it is to replace all the Red Ball Expresses and Alliances of Defiance with wider maps, and to add point-blank penetration spikes to all vehicles so that Tank Destroyers aren't the only answer to heavies.
I doubt such changes would be popular though.