2 things to remember about the Rams during Dickerson's 4-1/2 seasons prior to the trade. They didn't have a QB, unless old Ferragamo, Kemp, Dieter Brock and Steve Dils works for you. Then they traded for Everett, who was a rookie in '86, and injured in '87. Faulk had Warner. If you thought Faulk was all-world with the GSOT, I rather doubt he'd have the same success with Dickerson's Rams.
Secondly, Dickerson was the Rams' offense. (On a side note, he should have been the highest paid RB in the NFL, but Georgia and Shaw were one of the cheapest owners in the NFL.) Faulk was one of many weapons.
Btw, that superior Oline got stuffed more times than you'd think.