This is going to sound like a silly suggestion, but I remembered seeing in the Housing trailer for SOLO a Weiqi (Go) board with two players hovering over it. While I am sure it is just meant to look aesthetically nice, as every good chinese scholar should have a Weiqi board, if there was an actual Weiqi minigame to pass the time between the other main SOLO content, I would literally never log off.
I mean think about it, we already have a card game minigame built into our main game, and while I do like me some card games, I love Weiqi even more. I would love to sit down with my friends in my house and be able to actually play Weiqi with them, or to have boards sitting out in the open world and you can play with strangers, and perhaps you could get some titles, pet skins, or cosmetics from reaching how ranks in it. But even if no benefits were added whatsoever, I would spend significantly more time in SOLO just chit chatting on world chat while I played Weiqi if that were an option.