I love this game. The cards have tons of gameplay interactions and many many card references.
For gameplay points, more ways of out-of-combat healing would be nice (maybe a special "rest site" event similar to the campfires from Slay the Spire). Given the RNG-heavy blackjack mechanics can cause one to take high amounts of damage due to bad draws, it'd be nice for builds to have an easier way of healing damage if they don't have healing cards in their deck.