What sort of grand plans are you thinking about? Perhaps turning the shed at the end of the building that passes for a check-in hall into a B&Q?
When an airport has for it's customer base a string of carriers who pay next to nothing to use it (Ryanair etc) it's difficult to see where the money would come from, or even the incentive to improve the facilities.
I think that MAG probably has better things to do with their money in the current difficult economic circumstances.