Yeah, I very seriously doubt that the different refs would provide varying judgments/penalty calling styles like it was Fire Pro Wrestling. I don't think EA is that clever. I definitely know that the NFL wouldn't allow/encourage a perception that certain refs call this way and another calls that way.
It'd be exactly what we have now except a ref would be chosen randomly at the start of the game but with some half-assed recorded, awkwardly thrown together lines like they have the commentators do.