For anyone who's interested in this, it's gone to semi-open beta now. Meaning, they're not calling it "open beta," but you no longer need a key to get in.
I'm on there as Dorkelvania and Derceto is on there as Derceto.
There's not much PvE content at the moment, and earning cards is a bit of a slog or investment. (I have amassed a decent-sized pool of cards by playing draft tournaments, where you put up booster packs but can also win booster packs if you do well.) But I can help a few folks out with extra cards or even organize a league where we just play commons and uncommons if enough of us get on there.
Website:
hextcg.com/