re: Where is the relative weakness on this LSU offense?

Even with a bell cow like Fournette, historically, LSU always uses multiple backs.
Guice and Williams come to mind when Fournette was here.
Go back to Faulk, Collins, and Mealey even.
I don't see RB as a weakness with 8 guys who can contribute. The issue last year was no depth. Problem solved.

DB however, that's THE weak spot on this team.