Yes, it's extraordinarily difficult to imagine a good football coach trying to hide information about his team from competitors. That's so completely far-fetched and out-there. No coach has ever used uncertainty at position groups to give his team an information edge before.
I think you guys are being a bit naive here.
Saban had fake headsets created at LSU so that the opposing team would have a more difficult time knowing who their signal callers were. Harbaugh won't ever release his starting lineup to the media. Coaches go to pretty great lengths to hide almost-insignificantly small details of their football team.
I'm not saying Pruitt is doing this purposefully; I'm merely saying that it's a nice-little advantage whether it's deliberate or not. Not knowing with certainty where Trey Smith is lining up is a bigger pain for the opposing defense.
.....
(Speaking of which, Butch Jones was completely horrible at deception. Opposing defenses knew the offensive plays before they were run, because he made no efforts to disguise his plays. From what I've heard, that was actually one of his biggest weaknesses and why our offense seemed to get worse over time.)