Each faction had their upsides and downsides. US forces don't have throttled fuel income for example, and 'free' units when teching up. It's all a mix of abilities.
As I said if you want a direct comparison, the OKW barbed wire does take longer to build I believe, so it ties up more time early game if you want to fence off large areas. Not to mention that tying up a SturmPioneer squad to set up barbed wire is a lot of manpower and firepower being spent on building that isn't being spent fighting. Sending Rear Echelon to build/repair etc is only 160MP tied up, but if your sturms aren't fighting that's 320 (double!) the MP that isn't being used directly against the enemy.
Yes i agree with you this is the plan of relict. BUT Wy the Okw has sooo many advatages ?? Infrared scanners Hardcore Pioneers who beat your shooters. The pinning Kübelwagen.. When the germans change their fuel income at one truck they get more then the us... More over what is with the stuka ? The US have no rocket artillery. And the only positive I see in the US is the mediccar. You can play it but it is realy hard in early game against Okw becaus the Pios will crush your shooters ...