I wonder if perhaps it would be a good idea to revamp Gold into an all new Game Pass tier.
Charge the same as Gold, and call it Game Pass Online. What you get is online multiplayer and xCloud. That’s it. You’re not able to install games. You’re not able to access PC Game Pass. And more importantly, there are no more Games With Gold.
It would expose people who are currently only Gold subscribers to the riches of the Game Pass library, possibly enticing them into upgrading. And it would also be a good tier to have available in preparation for the inevitable xCloud stick.