Would be nice to see a story mode included
Mostly, TCGs are all about playing pvp, but a story mode adds another color to the game. From what I heard, Artifact will have a single player mode, but Valve isn't interested in making campaigns for it. Hearthstone has an adventure mode. Gwent's story mode is on the way, and even TES: Legends has one. If Valve could build a story mode that kicks ass that'd be great.