I doubt this is the case. They have allready had issues with lack of airframes where some routes such as Cardiff - Dublin & Cardiff - Cork were sacrificed for the flights they had to start in the winter season.
The only 2 x Aer Arann ATR-72 aircraft which are left are the od-ball EI-REH & EI-REI.
The Aer Arann product will only suffer if more aircraft will go on to the Aer Lingus Regional operation without more arriving to the fleet as they havn't had a good summer operation by all accounts.