Except it's nowhere near as simple as that. You can't get in someone else's ship if they're not in the same instance even if you are teamed and they're docked at the same station, i.e. elevators are not a magical instance hopping mechanism, they just relocate you within the same instance. They're not going to be completely reworked into the equivalent of an FSD jump because that would incur a huge delay every time you used a lift. We've all had experience with braben tunnels, imagine if they started happening every time you moved between the hangar and concourse.