

I haven’t bought the game yet, but I’ve been told this guy’s setting list on ProtonDB is supposed to help a lot.
Also apparently changing graphics options on the game leads often leads to bad performance issues for that session. After changing settings, if it seems like the game is running worse, you will likely need to restart the game to see how well it will actually run with the new settings.
It has split screen, so we play docked on a TV.
It does have online play too though, there’s a free friend’s pass that you can use for two people to play online with one copy. However even in online play you’ll be playing split screen, because it’s often important to be able to see the other player’s screen.