To answer your questions from a pond life Atco's point of view.
If the C taxiway was widened to take a Jetstream(currently can only take a Cessna or heli) then the C apron could be used for them.Also if the old Light aircraft park,now Scotia spots 1 and 2 used again for fixed wing, then that would give parking for 5 to 6 jetstreams combined with the C aprons.These aircraft need no push-back assistance, and should not be blocking stands.
As far as a high speed is concerned,then on 16 it would be very handy just south of 32.It would cut down about 2 miles of spacing.That will NEVER happen so aircraft just use more fuel,touring round Aberdeenshire.
Anyway lets hope we get some decent services out of there.I'm tired of going from Glasgow