Sadly, I find myself gravitating towards the 'Master Plan' theory that has been aired before on this thread. Whilst the airport management have taken plenty of knocks on here, there is perhaps some skill required in managing an airport DOWN while at the same time making it NOT look like your fault that traffic ceases or operators leave and keeping the costs of said downwards management to a minimum (including the marketing budget) until such time as a line can be drawn regarding acceptable losses, the lights are switched off, the doors locked and the whole site transferred to the development department.
In that respect, the DTV Management Team seem to have done rather well, and not long to go now to root out the remaining traffic through 'unavoidable' redistribution of fixed operating costs.