That would be great for them to add more staff, BUT, their small staff is part of the reason they are so good. If they get to big of a staff, quality might go down, and I personally don't think quality should be sacrificed for quantity
When I made that comment I made it assuming that if they had a larger staff and the qaulity remained the same, then obviously it would be a good thing if they could produce the same quality of airports in less time. Of course I would prefer they remain small if that is what it would take for them maintain the same level of workmanship.