This is an absolute ball.
Mods available through NexusMods (Not on the Steam Workshop sadly).
Bit of a grind, but enjoyable none-the-less.

Highly recommend playing an hour or 2, then go and hunt for your favourite TCG to mod into the game.
Can't wait to see what the future holds for this.

EDIT: A few updates in and I've pretty much gone off the rails with mods. I wouldn't even know what the base game looks like any more, but holy crap this is still heaps of fun!