I'd be surprised if Birmingham was discontinued. Bristol maybe not so much - possibly only profitable during the summer months for a 738.
Passenger numbers are down because the Hahn and Beauvais flights didn't prove profitable last year and have not been brought back. Because the seats for those flights were sold cheaply they skewed the passenger numbers a bit for 2012 - like a mini version of what happened at Shannon for about five years. I think this year's numbers and the 2011 figures give a truer picture of where the airport is at - about 650,000 pax p.a. still.
HHN and BVA mostly had empty seats which couldn't being filled with fares of 5 euro.
Malaga was launched which should of got good loads.
Over all the bucket and spare has increased competition this year and people will go for cheap even if it means traveling further afield. Then their is the Irish-UK market which is struggling at the minute.