See this post from a thread you started over a year ago:
Originally Posted by
KIR@GCM
I am a oneworld emerald looking at EI travel (TATL) in Q3 2016 and found this on the AerClub FAQ:
Will Aer Lingus be a member of the One World Alliance and will I receive the associated status benefits if I am a member of AerClub?
Aer Lingus is currently not a member of the One World Alliance and therefore these benefits will not be available.
The above wording does not explicitly exclude a future in OW but it does not give me any degree of confidence about possible OW benefits in the near term.