Suspect this letter is only the tip of the iceberg! - indications are that N Ireland travellers are at long last wakening up to the fact that other carriers like Bmi/Bmibaby, Flybe and even Jet2 provide better service & punctuality. N Ireland people are pretty astute when it comes to vfm and if they perceive they're being short changed, they take their business elsewhere.
Easyjet's (claimed) dominance of the N Ireland market will be short lived unless they get their act together soon!