In terms of the growth for 2015 and this winters growth being higher than the summer forecast, maybe MAN is working on reducing the 'seasonality gap' between Summer and Winter.
Typically in the past, due to the charter nature of the airport, the summer has been much, much busier than winter. For example, Jet2 parks up the majority of its fleet in the winter, and Ryanair has done similar.
This February saw a fair few increases, namely from the MEB3, Icelandair, Aegean and Flybe. Next winter we already know Vueling have added a winter programme, increases from easyjet and possibility of Hainan and Austrian, and thats before we getinto the 'announcement rush' that usually occurs June-August. So, the focus of growth may now be in winter, where the infrastructure is better placed to cope with the growth, and, people are increasingly starting to travel more frequently all year.
Ryanair are already starting change their policy on parking up aircraft over the winter periods, Jet2 may follow suit, and lets face it, its easier to add frequencies when airlines have spare capacity rather than the peak season when the aircraft are run ragged.
So, lets not get down on the fact 'growth isn't as much as expected' this summer, just be thankfull there is growth anyway, but, I do now think the winter seasons are where the more noticable growth will occur.