are you talking about the 1v1 game mode or the 1v1 unit performances?
I don't play 1v1 (tbh the pace is kind of slow for me). I mostly play 2v2s and sometimes 3v3s
If 1v1 GM, then I cant really comment, I dont play it often.
Edit:
I agree with the map focus. Trios especially, the retreat for USF is bugged. lmao
Unit performances are the same in all modes
Difference is, that in team games for example, its a lot easier to contain the broken OKW early game, OST has harder time exploiting holes in Brit army, and so on
On the other hand, it has its own problems, arty spam, possibly ISU too much of a comeback tool and so on
But yeah, maps are messed up across all modes, yet way less difficult to fix than faction balance