Great to hear that the airport is so busy but obviously not if you are queuing for food!
The Masterplan is supposed to come out this summer so it'll be interesting to see what terminal expansion plans there are and if there are plans for a new one. The current terminal is rated for a capacity of 3 million passengers a year i believe so to get to that the airport will probably need another LCC like Ryanair or Easyjet operating a significant network and someone like Jet2 also to come along and increase the passenger numbers! The ACC meeting i believe is on the 17th July so hopefully they'll release the masterplan around that time.