I feel Minor Arcana is a step in the right direction but I think perhaps converting held cards into an attack or heal without RNG or so much set up would be a beneficial balance and relieve a bit of the lack of the oGCD options.

You have a card in hand, you can use it to perform this attack, or you can use it to perform this heal. Instant cast.

It'd help when you keep pulling "bad" cards, too.