The building doesn’t look that much bigger that it does in real life, from the few screenshots we’ve been privvy to. I’m looking at a photo I took back in 2003, and the scale looks alright.
As for the pavement, it’s just pavement, I just care about the station.
I’ll certainly agree that the walls either side of the arch look a little wider, but this may have been a change based on implementing the interior from the LA Firehouse in the NY exterior.
But we shall see how things develop between now and the game release. Hopefully we’ll see more shots of the Firehouse between then and now.