It works properly. Iv been playing around with IGD lead lately and actually just omega'ed his leader ability today and there is a deff a noticeable increase in counter proc. Now granted like I said I only did it earlier today but it seems like to
Much of an increase to chalk it up to good RNG every battle
I don't think it does. Watch lots of video of my counter Jedi team and damage seemed to be the same on counter. I believe it has been flagged for review by @CG_Kozispoon already.
I tested and confirmed the bug as well. Basic attacks were equal damage to counter attacks on Jedi allies. There was even an instance where the counter attack did less damage than the basic attack (and no, there wasn't a crit on the basic attack).
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Much of an increase to chalk it up to good RNG every battle
https://forums.galaxy-of-heroes.starwars.ea.com/discussion/57248/ima-gun-di-counter-damage-bonus