PIK1341, great response, and actually no one would disagree with the rational behind your questions, and if we had the answers......
however, your thrust concentrates on the airline, and not PIK as an asset. Frankly, the airlines, can, and do, whatever is in their best interest. If PIK figures in that equation, superb, -- note it may well do in the future if there was a step change in transportation. No crystal ball however, so who knows?
However, right now, and for the past decade, it has been a massive drain on finance, regardless who owns it. It is the public purse now, and sorry, with GLA/EDI, in the mix, and the relatively small population in the catchment, it cannot support three large airports. Just the way it is I am afraid.