The Catalan government are accusing FR of wanting to 'lowcostitzar' El Prat - what a lovely verb. This doesn't tie in with their idea that Girona and Reus should be the low-cost/holiday airports and El Prat be the hub.
Having said that, Go/Easyjet have operated there for years, and the new and old terminals put together look rather underused, though a second runway was certainly needed; so I suppose BCN is glad to accommodate Ryanair - unless their competition forces established operators out.
The following link is in Catalan, but you should get the drift. Girona airport thinks it will attract other airlines in future.
ryanair