If that was done then the meta would simply become call in infantry...There is a sheer endless list of infantry in COH2 you can't possibly nerf all of it just to suit your taste of "low lethality" infantry combat. Just imagine if Volks were nerfed, Shocks and Guards would just steamroll OKW. Same for Rangers, Paratroopers, etc
Now you simply missing the time element. Mainline infatry give the pace of powerful weapon should be around.
When Relic reduced the CP of Penal Guards to 1 they completely dominated the field.
But imo Shocks Guards Ranger and other units should also be toned a bit.
If Doctrinal units are available early they should come out weaker and buy their upgrade similar to mainline infantry.