I have completed 2 OW RTW and am nearing the end of my third. My experience has been that if there is any significant change, the only people that you should talk to is the AA RTW desk. They know the rules and can help you. I have even had the EXP desk and the RTW desk at the same time to have a problem resolved.

Can the Dublin AA office connect you with the AA RTW desk? If you have not used them, you might try them.

I used CX once for a RTW because they can computer print a 20 segment ticket. They issued the ticket and handled a routing change very efficently. The tax and change fee was calculated and I mailed the ticket in and it was reissued while I was in mid trip.

Good luck.