And it is not a problem for a very simple reason.
OKW are designed to an aggressive and UKF are designed as a defensive one.
Ost is designed to be a defensive faction and they have access to 0Cp aggressive call in infantry (so dose UKF).
Okw is designed to be an aggressive fation and their mainline infantry can immediately dig in with sandbags.
USF is designed to be an aggressive fation and doctrine ability allow them to dig in as well.
Thus, saying OKW having early game superiority is not an issue while UKF having the same (with doctrine) is an issue because "faction is designed to be like so" is nonsense. Those two are either issue, or none of them is.