Card balance?

Chapizwow

Are devs planing to do some actual refined work and balance cards or do we just have to deal with the common rng of a card game with the addition of a boring meta conditioned by broken cards?

it makes no sense to me that you guys create a card like grafaiai which is fine but then create a card like greninja and can't see the balance problem between the 2; and this is just one example….

DoubleCure

hum… is it still unbalanced this days or got better?