Hi jmitchell.
A vallid point, but as I live here and we have many visitors, unfortunately for me, "nearness" is simply relative.
Our visitors (possibly all visitors) are inevitively governed by the "convenience syndrome":
Where is the most convenient airport of departure TO THEM::
Which offer flights departing & returning at convenient dates and times FOR THEM::
THE COST!
I bow with no resistence whatsoever to THEIR travel plans - it entails for me a collect time of:

Corvera - 15 minute?.
San Javier - 30 minutes.
Alicante (my least favourite) but still only 50 minutes.
So in the WORST possible case, I make a round-trip saving of around 90 minutes: hardly life-threatening, and our visitors seem to enjoy the additional 30 minutes relaxing in the car and indulging in current gossip.
So from a personal aspect, I am totally underwhelmed about the prospect of Corvera - my regrets are for San Javier & the immediate surrounding area if San Javier is forced in to closure.
The economic climate in this area is dire enough already:closing San J will force many taxi drivers to re-appraise their future: at least 2 car-parks there will be left without a livelihood: the affect on the local workforce, and so it goes on.
I am also acutely aware that urbanisations like Corvera & Hacienda del Alamo are nearer to the airport than Mosa, and will possibly be more attractive to holiday tenants.
What what gains on the swings, one loses on the roundabouts?
.