Agree with all that’s said. It was too generous (10x earning on Chase Travel, then 2 cpp is effectively 20% rebate).
So it’s not surprising that it’s getting devalued but disappointed that it happened without notice.
Long term brand damage is unlikely. Just look at Delta SkyMiles. People will continue to get Chase cards since it’s one of the biggest issuers and how else would you earn Hyatt points at the bonused multiples.