I'm definitely thinking it's a real plot point, but, just to argue devil's advocate, have they're actually been scenes shot with her in those outfits and the Doctor there as well? I know at least for the spoilers with the byzantium fatigues she was seen with Amy but in a non-Doctory context...that is possibly in a different reality or time stream or something. (I don't want to say too much because...Spoilers.)