Sorry EastMids but I have to disagree with most of what you say.
EMA, as do most regional airports benefit hugely from LCCs. Both FR and LS have been and continue to be excellent customers for EMA and have probably been the airports only carriers ever to have shown long-term commitment to growth and expansion.
EMA would not be the airport it is today without them; It would be uncompetitive and most likely unprofitable with a small number of full-service regional subsidiaries and a handful of holiday charters. And your suggestion to turn away LCCs from certain routes to encourage full-service carriers is stark raving mad... That would just be shooting yourself in the foot and a completely unsustainable way to do business.
Remember that airports are increasingly looking at ways of maximising non-aeronautical revenues in order to reduce aeronautical fees to win new business. To do that you need passengers and the fact remains that only the LCCs can deliver large increases in passenger numbers quickly. That's why you see airports like BHX, GLA and NCL increasingly turning to LCCs. Look at LGW compared to 20 years ago!
I do think there are some opportunities that could work ie KLM Cityhopper with 2 or 3x daily to AMS but the proximity to BHX, MAN or indeed HUY probably makes it unattractive for the airline. That said it will only ever account for a small part of the airports total traffic.