With regards to the pax, it was the airline's decision not to deplane them, there were in excess of 500 beds ready and waiting to be used if required.
The aircraft is currently parked in front of the former Luftwaffe hangar as there are no hangars big enough to wholly accommodate anything bigger than a DC-10.
Goose Bay handles trans atlantic diversions on a regular basis, nothing much different about this one (other than a slight deficiency in the propulsion department). The Lancaster that passed through on it's way to the UK a few years ago raised more interest locally than this.