The great war event is a definitive example of Gaijin Balance

Good IRL = good in-game.
Tiger II 105 is currently unobtainable for those reasons.

Raketenautomat is rather mediocre in-game which is why it’s 8.0 and not higher. No stabilizer, super low traverse, and low armor on a semi-wobbly chassis. It’s primary tactic is ambush positions.

The T-80 family is less capable than Abrams sure, but that doesn’t mean they’re bad or things are imbalanced.
SAV being more miss than hit doesn’t mean that it’s unbalanced.

T-80UM2 was not forgotten, your screenshot shows its BR is 11.3 and not 11.0.

Gaijin does not have a 0.3 rule.

It has a Active protection system so by gaijin rules it should be 11.3.*
Fixed it for you.
Major modifications.* Calling major modifications slight reads as blatantly malicious.

Generally speaking

you’ve made a number of observations and drawn a number of conclusions. It’s not self evident that your observations or evidence supports your conclusions though.