The way in which EZY has structured it's initial and, more importantly, it's recurrent training mitigates the perceived risk of crewing two relatively inexperienced together. Indeed, two 3* (i.e. inexperienced) crew members are not allowed to fly together. Strict adherence to SOP's, ECAM & QRH procedures reduces the perceived risk significantly. The only area in which an inexperienced DEC/DEFO may screw up is therefore confined to poor commercial decision making and even that is mitgated by a requirement to consult with HQ whenever possible (via ACARS normally). Nevertheless, all new Captains are paid 90% of the normal basic pay until their probationary period is up, which is a form of compensation to the Company for minor commercial misdemeanors while the new guy/girl settles in. So overall, in EZY at least, I see no problem with the current level of experience in the flightdeck.