They need to keep tweaking the Health of heroes

We just might see that.

This isn’t really true.

The game uses un-mirrored win rates, and if everyone picks her, her win rate would naturally gravitate towards 50%

You can see Wuyang is having a near 100% pick rate but still not gravitating towards 50% largely related to his overall power level.

Should be Masters and below, since you’re shrinking the population the further you go up.

See a hero perform well in higher ranks doesn’t really indicate there’s an imbalance with the character.