Yes really. Cyrodiil is not the name of a city anymore. [censored] forgive me for using terms as they are now in the games and not brushing up on my past lore. Jesus.
Considering he said that, though they used Imperial City in the actual game, that says to me that originally they had planned to refer to the city as Cyrodiil, and then later changed it to the Imperial City to make things easier to understand, especially for newer players who weren't familiar with the game world. Referring to it as the Imperial City doesn't mean that the lore has specifically changed and that it's simply no longer Cyrodiil. It could just be a different way of referencing it (no different than an American, for instance, might refer to D.C. has 'the capital.' It could also just be that over time, in the game world people started referring to it as that, which wouldn't necessarily make him wrong to say that in character, but perhaps old fashioned.
Anyway, I just think it's wrong to condemn the guy because he referred to the city in a way that it has been referred to in lore.