OKW currently works this way, has access to atg no matter which tier it goes and it works really well for them because the choice you make depends on your playstyle, map and resources. You are not forced to go a certain tier every game no matter what. Or go the same commander to fill missing parts. I think Sov, USF and OST would benefit from these changes. Making their playstyles more versatile and less predictable.
P.S.
Is this the first time we agree on something or am I reading it wrong?
Has an ATG gun that has less range, less pen and hits fence posts 50% of the time. Its the 2nd worst at gun it the game. Allied AT guns arnt as such
Making their playstyles more versatile and less predictable.
I dont think that means much and shouldn't really have much bearing on changes. "more versatile and less predictable" is so subjective and open to interpretation its meaningless.