I kinda agree with this. Tanks like the 105 Dozer and Brummbär should be a greater threat to AT guns than vice versa. If anything you could argue that they could become a bit more susceptible to tanks as those should be their natural counters. Right now at least the Brum can get out of harms way quite quickly if things go south and hunting it down is rather difficult. I think a slight acceleration nerf, as was proposed in another thread a while ago could go a long way to make overextending with these tanks more punishing. Other than that I'd say their durability is fine.
This goes back to my initial point: Brummbar is a snowballing vehicle. If only meds can counter it, there is no counter if the Ost player rushes Brummbar first with a resource advantage. Then it makes it harder to counter compared to similar vehicles and costs.
To illustrate my point better: Say Ost player gets resource advantage either through more points totaling more MP or both fuel points totaling for more fuel. Ost player gets Brummbar with resource advantage. 3 scenarios, either more fuel, more MP or both.
The opposing player has limited options to counter.
1. Get an 2x ATG which is already more MP than the Brummbar and would cost more because Brummbar bleeds MP as an AI unit. Its 640MP for UKF/Sov and 540MP for USF but because of the high armour Brummbar has, USF would end up having to use muni to counter which is not feasible when playing at a resource disadvantage.
2. Get a medium which doesn't counter the Brummbar as well because of high survivability. T-34, Cromwell, and Sherman AP don't do a good job of countering the Brummbar because of their slow shots and having no snare. Not to mention that Brummbar has high hp and high armour for a good bounce rate.
3. Get a TD which is the same cost as a Brummbar. Not possible at a resource disadvantage.
4. Get handheld AT. Not feasible for Soviets as they PTRS's are not enough to deal with the Brummbar because (again) of the high armour. Also not a good option because Brummbar is a AI unit which can counter this counter.
There is no better unit to snowball a resource advantage than the Brummbar and I hate it. I'd argue that part of the reason why German team games win rates are so high is because its easy to gain a resource advantage with MG42 early game and then snowball it with Brummbar.
I like that the Brummbar has a high skill cap because of its attack ground mechanic but its much too forgiving with its high survivability. The high survivability was probably fine when Ost didn't have access to the Panther but now I don't think its warranted.