Sea of Thieves
Rare is a developer that rarely disappoints, and Sea of Thieves was supposed to be a big deal for Microsoft and the Xbox One. The original promise was that of freedom for players to navigate the seas with their friends, commanding a ship through micromanagement.
The mechanics are enjoyable. Communicating with others to handle the different tasks of navigating a ship or utilizing it in combat is fun, but the world itself feels devoid of things to do. Sure, what is present certainly has character, but it would take a while for the developers to create content that actually made the game feel worthwhile.