So wait, Feferi and Eridan are god tier now? The first time I read that update I thought it was showing an alternate timeline but I've reread it a few times and I really can't tell...

The god tier versions of Eridan and Feferi you saw were dead and inhabiting a dream bubble, having died in a doomed timeline where things might have gone differently. When the meteor, flying through the Furthest Ring, passed through that particular dream bubble, its inhabitants met those versions of Feferi and Eridan, and then WV was healed using dead!Fef’s god-tier Life powers.