Which shop/link did you order from?! I only ever had ominous shops disappear on me that were selling obvious fakes. But never a big seller.
But no, these metrics don't matter a lot. Neither of them is something you will be looking at WHILE you are riding. And even after the ride, I have never checked pedal smoothness. L/R balance is nice to have but not super crucial. Except if you are very one-sided on your power. That might be an indicator that something else is amiss (bodily imbalance, leg length discrepancy, ill bike fit).
