I still have serious doubts as to whether EI will ever get A350s; the order is a legacy from the Dermot Mannion days and virtually everything else from that era has been unwound; the A350 was ordered in a time when there were little or no fears for the economy. Now, there is a completely new reality. Even if the A350 does join the fleet, it won't allow any route expansion, as it's about 20-25% bigger (in capacity terms) than the A333.
My bet/hope is that EI will be able to find a lessor to take on the A350s and it can then move to a more suitable aircraft.