I know CIG hates instanced anything, but this makes total sense. Land at designated hangar, but then be transferred to instanced persistent hangar where, as you state, vehicles can load, cargo can transfer, and no need to clear in so many seconds for next ship.
Stations are gigantic, so it's easy to imagine that the instanced hangars are just deep in the bowels of the station and they get moved around inside it when you need to leave.
Certainly, with server meshing, we could see hundreds if not thousands of players going in an across various landing zones and stations, so there will be nescessary need for instancing in regards to hangers and also spawn locations such as apartment bays. It will not really ruin the sense of immersion, perhaps they can make it so that you can even invite friends over to join.
