This, combined with how powerful Guardians currently are, means that the game has generally gotten too easy, and Blackburn said that the regular playlist content won't be nearly as difficult as day-one Raids are, for example.

Source: https://gamerant.com/destiny-2-difficulty-increase-explanation/

With players who preordered certain tiers of the game getting access to the full release ahead of June 6, a day-one patch could even be implemented before the rest of its players get access, helping have a more successful launch window.

Source: https://gamerant.com/diablo-4-final-third-beta-test-gold-launch-window-final-polish-day-one-patch/