This division is not just going to collapse for the Rams
The Cardinals as you said are but a David Johnson return and a FA Qb away from returning to playoff caliber.
The 49ers now have a QB and a great play caller to go with some pieces on defense. It would not be stunning to see them become a playoff team
The Seahawks narrowly missed the playoffs this year after their defense suffered catastrophic injuries. They have a top flight coach and QB.
This division looks tough and the conference even tougher