I think we need to do both. I don't know how we can possibly support the game without selling new cards, which is something that every other TCG I know of does and still manages to attract new players. That is a big part of what Modern format is for - it allows new players to only deal with a smaller subset of cards.

So I think we continue to sell new cards, and continue to introduce new and interesting mechanics to keep the game fun and exciting for our existing players, while at the same time work on our onboarding experience to ease players into the concepts over time.