Can't see easyJet going down the Airbus route. I know the chief pilot is very pro Boeing. They seem to think that the 737 is better for quick turnrounds with little ground support. They point to the lower cargo hold for easier access if loading equipment is not available and the airstairs if pax steps are not available, amongst others.
Having several thousand hours on 737's and A320's I don't agree. The A320 is great for quick turnrounds.
As far as Stelios leaving that has something to do with his shipping company having legal problems with Italy. With Go flying to Italy (easyJet do not) they may get future legal problems if Stelios stays too close to the company.