Since my roadmap announcement last week I've been hard at work. Now I'm glad to say that the first part of that plan, titled the "Mall Rat" update has released, adding a new character to the abandoned mall. It also comes with a little gachapon mini-game (not real gacha, don't worry).
The next part of this update will include some more exploration features, and then it'll be more content after that, starting with new playable cards. Progress is moving along quickly, so the new stuff should be coming very soon.