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.
Yep thats why new ***captains find ***FO's on their roster at roster publication, only to find out that when the date approaches they have just completed their 100 hours of line experience that is required to loose the stars.
So now we have a 400 hr guy sitting next to a 3500hr captain. Still a sub 4000hrs total experience in the flightdeck.
And that can happen 5 days in a row!!! I don't see how this mitigates against the effects of inexperience combined with fatigue arrising due to this inexperience.