In TGG his office was cramped, loud from the window and pretty normal looking.
In TRF his office is huge, warm and lovely (also apparently the first time John has visited the Diogenes Club, so does that mean TGG office was his boring government office the diogenes is his personalized prefered office?) (though i am amused by how much time he spends sitting in a single chair looking at a wall ignoring the people sitting nearby)
But then in TEH his office is dark, cold, cramped, utilitarian and with distracting weird ceiling tiles. It even opened into a room of cubicles when Lestrade visited (i dont remember what episode that was in). Very nightmarish and unrealistic? Why would anyone do desk work there, it’s too dark to read properly, it looked like hell.
Why do you have so many offices and why is the third one so shitty, Mycroft?