Normal gamedesign → those roles were not filled by those tank crew mens until the apparition of reliable and portatives radios.
Even into the 1940 year, every armies had only 1 tank out of 5 using long-range radio, into German,French or English forces,… (not even talking about the Russian one, which Radio number was even more limited)
So having a radio per tank, and filled by Commander aswell is pretty much fair to everyone.
For gunner on aircrafts → i don’t see how they can be used on a fighter for exemple, which doesn’t have a turret, or the crew for such intended role.
In such you’re complainning of a waste, but you should read those skills first,…
In my opinion:
Important tank crew mans are :
Loader/Driver/Commander/Gunner (in this very order) + (mostly the Specific skills and repair skills)
And for aircrafts crews:
→ pilot is a priority over everything
- Rank of reparation
- Speed of reparation
- (+Speed of reload if you play arcade only)
Every other skills are easily compensated:
→ aircraft gunner can be used manually, with little practice can be very efficient.
→ artillery calls are useless after Rank2, unless it hits directly,… and even there, it is only tracks most of the time.
EDIT : i just saw you do have 10k battles already, but it seems you’re ignorant on many points of the game.
Well in a way, those points of the game are not explainned clearly.