Was just thinking about this... just speculation on my part.
Just speculation, but what if Amazon is leasing the space temporarily at Chrystal City (if it happens, given the vacancy rate being high), moves into LIC NY, and when more space is created, eventually relocates the talent to LIC in total.
All under one roof, once the master plan is up and running in LIC?
Possibly using the DC metro to gain the talent easier as it has two locations to draw from, build the talent pool, and provide relocation and housing assistance once the LIC/Queens facility is up to make the transition from DC to NY?
On a side note, I suppose they could segregate divisions between the offices, support vs back office vs tech, and so on. But you'd think from a HQ standpoint, one roof would be easier.