This is the first time I've heard of physical cards related to Holozing. I think you've thought this through well. It's important to be able to physically touch the cards associated with the game.
By the way, when exactly can everyone start playing the game? I'm guessing May.
We're trying hard to make it playable soon, things just always take longer than expected but we hope to be able to hire some more people in the near future to help us along!