https://wccftech.com/sea-of-thieves-successful-launch/

Rare’s Sea of Thieves has been criticized at launch for its lack of content. Despite the criticism, however, it seems like the game had a successful launch.

Speaking with WindowsCentral, Executive Producer Joe Neate said that Sea of Thieves had a successful launch, with the game getting more players than expected. He is also aware of the criticism, and so the team is going all out to add as much stuff in the game as possible, to continue getting players as well as getting current players engaged.