I think it's defo aer lingus regional ,I agree with what you say as regards jet capacity but it's about sustainable air services these days and turboprops are a lot cheaper to run than a Boeing or airbus. For knock I'd say jet wise a flybe embraer 175 or 195 would be perfect capacity.
Knock is doing the right thing by keeping their options open by bringing in another airline aer arann.
Anybody know how loads are on new euro routes?..