Could the cunning plan hinted by Suzeman concern the potential satellite on Terminal 2 having an additional departure level similar to the designs of the new terminals at Frankfurt and Munich to deal with the segregation of Shengen and non-Schengen flights using the same gates?
Just for the avoidance of doubt, I am assuming MAN have a cunning plan to re-develop the terminals only through what I have read here and elsewhere and have no insider knowledge of what is happening.
But assuming they do (and I hope so!), I'm sure vertical segregation for different categories of passenger will be a feature as will a certain amount of flexibility (which of course costs more) as the rules and regulations are constantly changing as, of course, is the nature of the business as the link posted by Bagso shows.