Wait when was it nerfed or am I missing something here? I checked both the revamp commander patch and the USF tech mod and there is no mention of this.
It's live.
https://community.companyofheroes.com/discussion/67/coh-2-changelog/p5
Post 148.
The Brummbar got an armour reduction, a nerf to its Vet 1 AT gun deleter ability and a range reduction.
Its firepower is unchanged, but it's less tanky and therefore more vulnerable to armour attack if not supported.
The patch also reduced the veterancy gain on the Flame HT, reduced the sight radius of T-70 recon mode and implemented a workaround for the infamous ZiS gun bug.
Ok then lower the price accordingly to 40 fuel.
The point he's making is that armour does matter. Vet 2 armour skirts don't make much of a difference to dedicated tank destroyers, but the Utility Car's armour skirts don't make much difference to a StuG.
However, those skirts help those tanks bounce T-34s, Cromwells and Shermans a lot, forcing the opponent to spend a lot of fuel on a tank destroyer that contributes nothing to the infantry battle that ultimately decides the game.