just to add a positive feedback, I've really grown to like the state of the game now, with no Gold immunity and Create and all!
But I also think it is necessary to make sure that _all_ current cards are viable before adding new cards. I'm sure the devs have access to useful databases to see what seems not good enough to be played in its current form. The saddest thing is gold / silver cards lying around that noone uses.
bringing old cards up to speed is as good to variety or, perhaps even better , than adding new cards to the meta.