I like the idea of having it as an addition to the Gameview, but maybe not outside of that.
During the course of a game, a good coaching staff should be able to start narrowing down on who's in what role in what sets, so I don't think it would break the game. Plus after the fact, teams always break down tape and can further refine their own internal 'scouting' depth chart. But does that necessarily mean that's what you'll see next time?
As Black Adder said, it would add an interesting bit of immersion, especially to the division games; will the setup be the same facing a division rival at the beginning of the year as it would near season's end with playoffs on the line? Or do you wind up getting burned by a hotshot WR they had buried in their roster that can go toe-to-toe with your stud secondary?
Just my 1/50th of a dollar.