If the cropping had anything to do with making the camera look like it's not being shot through the window, then why the hell crop shots like this:

yet a few moments later he leaves this shot uncropped..

And why crop this shot at all?

Oh, and i really can't see how it even remotely looks like the camera is shooting out of the window when it is in exactly the same position as it was in ANH. Compare these two pics and you can see that there is no difference apart from the scale of the cockpit and the top and bottom frame cropping.

Funny how NO ONE had a problem with the framing of these shots until AFTER George cropped them. I never heard a single comment about how the camera position broke the fourth wall or anything like that. You forget that, in ANH, not much really happened in the cockpit. The original set was fine for the small amount of movement needed for that film. When it came to ESB, more action was happening inside the cockpit so it needed to be a bit more spacious to allow the actors to move around more.