If T2 is to be a glorified shopping arcade (I have no problem with this in principle) there is no reason why it cannot also be light, spacious and inherantly functional as an airport terminal.
Hit the nail on the head ! No problem with exposed aircon/heat ducting per se when combined with a light, airy spare. Doesn't go well with narrow corridors and low ceilings though
MAG has always maintained that the TP as envisaged so far is broadly capacity-neutral.
But they have also stated ambitions of "10m more passengers in the next 10 years, and 55m by 2050". We all know the current facility struggles to cope with 25m pa in peak hours. Something doesn't quite add up !