Sorry If I came across as implying they're trying to «cheat». That's not what I think. Perhaps «get away with» was a poor choice of words from my part.
Designing a game is a balancing act. Again, Konrad might deem other aspects more important, which he has every right to. He has a bird's eye view of the entire game, what needs to get done, by whom and by when.
Yet, personally, while I'm quite confident TW3 will be a landmark in the genre, there are a few specifics which leave me uneasy, Novigrad's size being one of them, especially since they've chosen not to leave us in the dark about it, at least not completely.
So it is not like I assume CDProjekt is out to con us. They simply might feel differently about Novigrad's size. They might believe it's not that important, that it won't be that big of a deal now that Oxenfurt is no more, and thus the resources are better spent elsewhere.
All in all, I'm simply borrowing Emporizon's tactics, replacing CIri with decent-sized-Novigard />