I'd add the lack of earning UA PQP to the headwinds...for the UA loyalists here, the cost/benefit to consider will be "is sacrificing PQP's for the CPB pre clearance worth it" on flights to Europe outside of DUB. For example, do I value CLE-DUB-MUC-DUB-CLE with no PQP, but the direct TATL to CLE more than I value PQP's on CLE-EWR/IAD/ORD-MUC-EWR/IAD/ORD-CLE.