Overwatch 2 has a simplified endorsement system. It's just an optional thumbs up instead of endorsement for 1 of 3 reasons (roughly something like sportsmanship, good teammate, or good leader).

The avoid system is now more flexible. You have 3 pin slots for people you never really want to see on your team again, plus 12(?) regular avoid slots to avoid people for a week at a time like usual. In situations where too many avoid conflicts occur and the matchmaker struggles to create a match (e.g. high ELO), it will start to ignore people's avoid slots in order of (last regular avoid > first regular avoid > pin slots), i think.