USF can get away with spamming upgrades while Ostheer cannot, in a competitive game Ostheer will always be struggling with munitions.
And you don't need more than a few BARS to keep up with Grens, while Grens need a lot of support to keep up with Rifles.
In a competitve match USF will be struggling with Muni because USF AT needs alot of support and Panthers and Tigers do not. Same thing can be applied either way. Both use alot of munitions. USF however doesnt go no brainer with it. So it may not be nades it may not be BARs but you are going to be using them one way or the Other.
HVAP rounds for ATG, HVAP for Jackson, P47s, Recon flights, BARs/LMGs, Smoke, Nades, AT rifle nades. If you arent spending muni as USF you are not going to do well against an equally skilled opponent. I think you are confusing the early Map control USF has against Ostheer in most cases as a lack of Munitions spending. Its not. They tend to get more early and spend more later. But they will be spending it.