Thanks for sharing.

To add one more bit of data: when I made routing changes to my ex-CAI DONE4 it was re-priced and re-issued quite fast to my surprise, and luckily I should add, given that it was the last day AA was ticketing ex-CAI xONEx back in November. I called the following day with questions about the taxes/fees of my re-issued ticket, was put on hold while the agent got in touch with the fares dept, and after a long wait I was told that the fares agent was having issues recalculating the taxes/fess because the fare had been blocked, so they did not have access to the fare in their system. At the time, I was not sure whether this was in fact possible or just a way for the fares dept to bypass my issue. But given that ex-CAI fares had indeed been blocked on that day, I did not want to risk complicating my re-issued ticket in any way, and decided to leave it as that, but maybe try again after I had flown the first segment and when new ex-CAI fares would have been published. The latter seems to have been delayed for quite a bit, unless I have missed any news on new published fares ex-CAI..? Nonetheless, I will be looking into this further and will put an effort to get an actual breakdown of taxes/fees from AA. Will report back with any new developments on this thread, as the issue pertains to re-issue issues, or "re:re-issues"