Bear in mind also that BSL is an easyJet base and they are not going to take intrusion into their territory without a fight.
Which is, of course, why EZ are closing their base at EMA.
EZ and FR have differing business models: if EZ can make it work at BSL it fits their business model. Compare EZ in Switzerland with FR's non existent presence there; it doesn't fit the model.
Horse's for courses.