The Coin Skin suggested it is more aligned to one particular faction. The Cardback seemed to be suggestingI am confused, are you talking about the cardbacks or coin skins ?
As for the leader skins, from my observation they got progressively worse and less lore-friendly.
Can you elaborate what you mean by leader skins got worse? You mean the third one is/will-be worse than the first two? Sorry I didn't understand.