I’d say that sound design is rather meh.
Tanks imo don’t sound powerful at all. Even heavy tanks’ engines are rather anemic and gun sounds are also not powerful.
Friendly soldiers are just ghosts. They almost make no noise when moving and don’t speak (only scream when on fire).
Exception being my AI that sometimes talks some unrelated things (though I don’t recall hearing this lately, maybe I got used to it) or reacts to orders.
All/most plane engines buzz the same way. No matter what plane.
Sure it’s not the most important thing. But it could be better.