I like the brummbar range increase suggestion.
Rest of the changes are either overbuffs, overnerfs or just don't make sense at all.
Funny enough I actually agree with Katitof but I would agree in a more professional way.

I don't think the SU-85 needs a offensive buff and a compensation for it by taking away its vet 2 but just a mobility buff. Penal buff suggestion is nice though

Oh god that su-76 nerf suggestion though thats going to bring it back to when it was useless. I think the Su-76 should keep its penetration now since the SU-85 heavily outshines it in the late game unless the SU-76 is kept until vetted which will make it ok in the late game. P4 performs its role very well so I don't think it needs a buff. The Churchill nerf and T3476 change is pretty nice though.