It is actually a pretty simple system. Spread the field as wide as possible. Isolate the LBers. Show that you intend to pass. Hand the ball off. Run another play before the defense can substitute to solve any mismatch.
The key to UT's offense is running the ball successfully because it forces the D to tighten up against the run in a spread formation. Then you tell the QB to throw it over everyone's heads. That's how UT has the #3 passing offense but only ranked 36th in number of pass attempts. The two passing offenses ahead of UT attempted 126 (Wash 520) and 173(WKU 567) more passes than the Vols 394. Tennessee rushed the ball 485 times. That's more than anyone else ranked in the Top 15 except Michigan 522 and K State 486.
Georgia won by holding the Vols running backs to 76 yards. Tennessee entered the game avg 202 a game on the ground. Left in known passing situations, the Georgia defense was able to bring a lot of pressure. When your QB has 18 carries for 17 yards then you know he spent a lot of time being chased in passing situations.
Next time they play, I would expect Tennessee to have their receivers break off their routes underneath to help the QB. They never really did when they played in Athens.