I mostly like the US as a faction but a lot of their voice acting is either recycled from the campaign or voice acted so poorly that it feels like AI. I'm not joking.
The basic infantry reuse voice lines from the second and third main campaigns (including from a hero unit wtf) Settlers just feel like AI robots. They didn't even bother to write lines for them that make sense.
So while they do play in an interesting way the devs completely dropped the ball on the VA.