Does anyone know if the west chevron extension of the airport will be the last expansion of the current ITB? The airport plans seem to claim so but I've noticed this new extension has been constructed to be compatible with further expansions of this wing. There are no air bridges located on the end wall of the terminal (unusual) and the elevated arrivals walkway extends into this end wall even though the last air gates connect farther down this walkway making the end section seemingly unnecessary. YVR has also used the area immediately outside the extension as cargo parking area? which could be easily removed. (The airplane movement markings are located farther to the outside.) This all suggests to me another extension could be built here before an ITB/transborder eastern expansion.
Second, do more detailed maps/diagrams of the YVR terminal building design (or other airports, for that matter) exist? If they do, where could I find these (anyone have them available?

)? I'm looking for maps that show all airport structures including the aforementioned elevated arrivals walkway, transfer facilities, connecting passageways, arrivals hall layout, etc and passenger flow through the terminal buildings. The abstract terminal maps that all airports provide give minimal information and do not satisfy my curiosity.
Maps of airport airside/runway systems would be appreciated as well.
Is a lot of the above information purposefully hidden for security purposes (although there is no reason how this information would compromise security IMO)? What part of airport staff would have access to this information? This information extremely fascinates me.