Yeah I agree on that the infantry design of the WFA factions is terrible... especially the OKW infantry design but thats another topic
Of course you can counter them. But I dislike the whole concept of FRPs... ohh look Stuka strafe run my inf got pinnend... lets retreat back to the HQ
The OKW FRP is static and allies have plenty of counters against it (Priest, Katyuscha, 120mm, B4,...).
The Major comes as a "free" FRP (because if you want tanks you have to build him). If you lose him you can call him in for few MP again... If your enemy knows the location of your FRP you can easily move him.
Major FRP is kind of useless in 1vs1, moreover when you look at its mp cost, better use the unit as capping unit until its death.
Now if you want to remove FRP, you'll have to redesign both factions, giving them stock support units and combatant reinforcement trucks.
Now the whole purpose of this thread is probably going to be irrelevant in 2 days with the patch. HMG buff + ATsnare nerf is going to change the meta. Seeing more vehicle opening.