Or they are such expensive because spamming such a proficient, late game securing, unit is batshit crazy OP.
Performance would be the least of a long list of aspects that defines a unit cost
Maybe just add higher fuel cost - but is really sort of park it in the middle and see what happens unit. I'm surprised with its acceleration: feels like the most responsive tank I used. And this funny grenade for 20 muni I would understand that USF should have cheap stuff - but Brits were resources starved during the war