Ah right, forgot everyone on this site has no interest in serious balance debates - my bad.
If anything there's too much interest. It's just that the vast majority of them are between very low level players with very severe biases in favour of their favourite factions.
I bet you'd say the same thing if Rakketen, in some other reality, didn't have Camo by default and you'd say such a unit would be fine because of the faction's "internal" balance justified it. You say this, yet offer nothing to justify exactly what in the internal balance justifies the state of the MG34.
In my view the balance of individual units matters versus units in the same faction: this is what I mean by internal balance. If one unit is simply better than another in all aspects then the inferior unit isn't built. If a single Volksgrenadier squad is simply better than an MG34 then either the MG34 or the Volksgrenadier needs adjusting. I don't believe that's the case. I could be wrong.
In faction versus faction the whole matters more than the parts. Relic believed OKW could manage without an HMG entirely for a time. They later changed their mind and added the MG34.
If OKW needs a better HMG to get by then yes, buff the HMG34. But the general consensus seems to be the HMG34 is "good enough."