Diversifying gameplay has very far reaching consequences and I would much, much rather Relic spend their time getting their shit together and fixing the ever greater piling up issues than focus on reinventing USF every other week.
USF is more powerful than it's ever been, it has the most versatile basic infantry in the game with effective health that blows almost all other units in the game out of the water. It's got 2 viable starting tech choices, and really only has 1 lackluster commander these days.
At some point you need to pay attention to other factions, USF has gotten the fixes it needs to do well in every game mode, now lets try and see about pulling the Axis factions out of the toilet in 1's and 2's.
Checking the charts it seems like ostheer is the only one suffering that bad. OKW is only a little worse then the allied factions, they are actually doing fine 2v2 and up.
Either way it doesn't matter. Someone is always going to be top dog and some faction is going to be at the bottom. That changes every week. It doesn't mean that that is going to be the only issue we deal with every patch.
No matter how much they buff USF it wont change the fact that they are a boring, unappealing faction to play. And that's something that needs to be dealt with regardless of current balance.