No Day-1 patch on PS5 (yet).
The performance has been really good in the one hour that I've played it for. The game starts off so well! Also, the FOV option in the settings is so well done. Wish more console ports had this.
Also, I think they deserve those ratings on Steam, TBH. To delay a game "for further polish" and still have it un-optimised for PCs is pathetic from the dev team.