On the Ground,
A good post as it highlights several of the counter issues relating to both Servisair and the Airport in general.
Unfortunately for the staff at ABZ, Servisair's senior management in Scotland has been woeful and unaccountable for too long. There is a long list of errors, untruths and general lack of understanding of the direction required and methods to achieve this. The majority were employed during a black era of a mad ex serviceman who believed that it was possible to constantly reduce operating costs year on year. Sadly, due to many changes of ownership and manmagement the individuals in Scotland have been able to manage smoke and mirror pereformances whenever asked to account for their buisnesses.
As for the BAA, ABZ has been the runt of the BAA group for amny years. For a time is was the cash cow but that ceased many years ago; after the oil crisis of '86 would be my guess.
My only comment against your points is that no airport would look to expand their runway, and the cost at ABZ would be huge because of the topography, without the prospect of financial return. Sadly, one offer of a schedule to HOU would not come near; nor is there an untapped leisure market using equipment that would need the extra runway length.
My heart goes out to the Servisair staff at ABZ and I hope that they all secure alternative employment as soon as possible.
good luck,
GH