The best thing for Dub is to concrete it over and build houses on the site.
Then build a new modern airport.
The same could be said about LHR and a lot of other airports.
That would require forward thinking and sensible decision making!
Unfortunately those kind of decisions are made by politicians that only care about keeping their jobs at the next election!
How did the Japanese manage to build Narita? Did they lock the politicians up for twenty years?