What's the strategic value to FR of keeping a weak and highly dependent PIK still alive with a handful of FR passenger services ?
GLA may well offer an amazingly good deal for the next 2 years, but would FR lose their negotiating position of strength such that in 2 years time FR end up paying near full price airport charges along with their maintenance base possibly ceasing to be viable ?
Of course this has to be weighed against the higher fares that can be charged or more passengers by virtue of operating at GLA rather than PIK
Govt may own the airport but politics can lead to unusual things happening that would not necessarily be done for purely commercial interests. Long term mothballing is one option...