I personally think that mainly the infantry section needs an overhaul, since most of the tanks are good for the cost you pay for them. Perhaps some need some minor buffs, like Pz4 penetration buff. But armour is in my opinion fine. Infantry and them for the volks and missing the MG34 is terrible since you can't do shit and have to get a doctorine with it.
Pz4 is in a good spot, not too good against armor and pretty ok against infantry(though it comes down to RNG letting you hit sometimes).
Also, after testing obers and falls. It looks like obers have more DPS at long range but falls have slightly more at mid. At CQC, falls just kill things way faster than obers can; and I did this experiment while giving the obers the lmg34.