PF has analysed the economic situation correctly. You could draw up a list of half a dozen UK airports which should close by these criteria. There is undoubtedly, too much runway available in the UK at present.
However, it does not take into account the political argument for keeping these places open, supporting them and in limited cases expanding them. People need jobs, airports provide them, many are low skill-low barrier of entry type positions which are desperately needed, particularly among the unemployed young. When the economy upturns, remote areas such as NQY will benefit as they did in the boom years.
What is not needed is hair brained grandiose schemes which look great but have no chance of getting off the ground, or worse being set up, then turning turtle dashing peoples hopes again. Regional airports, their operators, supporters and local authorities are particularly prone to this disease. Reality check, please!
Keep them operational, mothball what can't be used profitably (terminals, maybe) and get a proper viable business plan ready for the upturn.