I bet they didn't show anything on purpose but wanted guys to play better straight up one on one. I would bet you Washington is calling some games now to get practice (being coached up) but RR takes over game 1. That would also keep any tendencies RR has secret until the season.
Another reason RR probably liked vets over rookies is they catch on faster to the schemes. This will take a little time so let's hope we squeak by the Rams to get to the Bucs and Cards so our defense can get in a rhythm. Even though I am encourage with the new defense I had a feeling it would take a little time to gel.