As you say the builders have all but left.
There are many area's that have not been completed that still contain hoardings including the landside waiting area by the toilets and the check-in area as the airline ticket desks are still using temporary structures. Add to that the lack of a ceiling and still vast amounts of broken floor tiles the terminal still looks half finished and in need of a make over. It was noted that when the terminal was opened by the Secretary of State for Transport Chris Grayling he was carefully managed even to the point that only the broken floor tiles were replaced where he was expected to walk..