How frustrating, a process that should have started 5 years ago, big pretty picture announcement a few months ago and now the airlines are just commenting.
I think you will find by reading back through this thread that someone posted several months ago that the airlines were involved in discussions at that time and had been for a while.
The announcement made eventually was mainly aspirational, vague on detail and the artists impressions were just that, not finalised plans. However it is disappointing if major disagreements still exist at this stage.
As far as off peak operations are concerned, the current fees and charges show some useful reductions for off-peak flights - mind you they have been in place for some years and I'm not sure how effective they have been. But in the near future, this has to be the way to grow as the current terminal peaks show high levels of congestion and with all the work which will eventually take place, it ain't going to get better anytime soon.