Depth at receiver could be one factor. Not satisfied with the potential at safety could be another. The third (and admittedly wildly speculative at this point) is that there could be some unexpected attrition in the secondary. The defensive backs' use and rotation (or lack thereof) was a curious subplot to the season.
Regardless, it seems certain Terry will play receiver. I bet the coaches want to see just how wide and varied his skillset is for future reference. Like Coach Reedy said, now's the time during bowl practice.