I don't understand this at all. OKW and UKF are forced into at least 3 Volks/Sections and no one has a problem with it either
When was last time you've played USF?
Its perfectly viable to fast tech after 2nd rifle now, allowing for support weapons use.
So why does USF need to be the special snowflake faction again?? And now don't tell me because OKW can spam Kübels and Sturms and UKF can spam Vickers and UC. I am talking about useful build orders. And if a USF player really doesn't want to build Riflemen for whatever reason he can still get Assault Engineers, Pathfinders, IR Pathfinders, WC51, Cav Riflemen etc etc
Because, contrarty to EVERY SINGLE OTHER FACTION IN THE WHOLE GAME, USF does not have ANY alternative to rifles out of the gate or within first minute.
Doctrinal options are not relevant to this.
In case you were in a coma for past 4 years, balance progressed in a way that doctrines are only supplements, not something you have to relay on for faction to be competitive or have diversity.