Looking at that Georgia defense, the bulwark of their strength was in their front seven.
Attacking their secondary was our best option, especially after they lost one of their starting cornerbacks. This is done more easily with an extra WR instead of a TE, and you force them to either play one of their LB's against a WR, or have them take out one of their excellent LB's and sub in a DB.
That being said, their secondary is pretty darn good, despite having lost a starter to the NFL draft, and another one to an injury. They are most likely the best one we'll have seen this entire year.