As example Japan assaulter 3 requires by far more exp per squad upgrade point than assaulter IV.
Sure this known issue something something new squads & old squads something something.
But this is ridiculous, just to give some perspective about this broken feature → began to play
assaulter 3&4 at the same time. And right now, I fully upgraded my assaulter IV squad, while the assaulter 3
got four ( 4 ) squad upgrade points.
Also noticed the gunshot sounds seems to be missing especiatly if someone misses you.
And the economy is still a joke.