The pillars of the business model of easyJet as Mr Harisson said it himself are a 15% ROE and a 15% growth.
The increased fleet rationalization has more to do with the fact that 65 A319 with CFM engines are now available since the banckrunpcy of SkyBus in the USA.
This means Boeing pilots will fly the Airbus soon, but also will will receive extra airbuses to keep growing, may a be at a slightly slower rate, but at a positive rate anyway.
I am more woried about EMA and Dortmunt bases, CDG LYS MXP and Zurich ! will need more aeroplanes soon.... (easySwitzerland did not stop recruiting ! )