Nah, I don't think it's about form, it's about Messi, once he's back on the pitch, they'll go back to the old Barca we all know. Without Messi, this team in form or out of form is average mainly because Valverde is a mediocre manager.
This is an underlying problem that the club management has to tackle. A club that has spent the amount of money Barcelona has on sign-ins over the past two or three seasons shouldn't be dependent on just one player (no matter how great that player is).
There are quality players, but not enough quality in the technical crew to manage them.