Not all seats are up for re-election.
ACDL will only commit to 'heavy' investment if the concession agreement is extended in order to get their money (and profit) back.
If the airport was to be sold off, ACDL might not be the successful bidder.
No wonder then the hiatus.
ACDL in theory could bid for Satansted if they feel there is no profit to be made in the remaining concession years.
As for Arann, until the terminal/parkway is opened, who wants to queue in a wooden hut when you can use the tinminal?