The difference was an injured Gurley. Y'all keep pointing to the 5 injuries when only 2 mattered Gurley and Murray. Without them the team suffered. Green as a #2 RB behind Gurley is no different than a Marshall behind Gurley and with Murray throwing to UGAs WRs it didn't matter whose name was on the back because none of them brought rare or elite skills to the game.
I already told you the clear differences between our WR situation in 2012 and 2013. Not close to apples to apples.
Green was a good little RB. The problem was the 4th string guy who backed him up having critical fumbles 2 weeks in a row after beating UT and running past AJ Johnson.
This idea of yours that all players need rare or elite skills for a unit to be very good really makes no sense. See the WR stat comparison for 399 attempts in 2012.