Interesting drill
One thing I forgot to mention while I was watching 7-on-7s this summer was the extra work running back Aundre Dean was putting into his pass catching. He stayed after the workouts several times to catch passes, and with an interesting twist.
While Dean was running pass routes out of the backfield, two balls were throw his way. One came from the quarterback, and the other was thrown at his feet by a helping teammate. The idea was for Dean to keep his eye on the pass from the quarterback, and not be distracted by anything else.

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That sounds like a good drill and from what I saw, AD could use the help. I have great hopes for the young man but from the limited times I saw him, his hands seemed stiff his pass catching unnatural.
I hope they improve soon.