I would strongly recommend sourcing a low-cost or free way to call the 1-800 number (including from abroad, mid journey). In my experience even a fairly simple call can sometimes take 30-60 minutes, with a bit of hold time and some exceptionally slow processes. Just today for example it took half an hour for them to reissue (strangely) a ticket just because AS had changed a flight time by three minutes and changed the flight number too. And then I have to check 24 hours later and call back if it hasn’t processed correctly - eg last time when I adjusted a JAL flight, AA only reticketed one passenger.

The AA RTW team is great, but their systems are terrible.

I’d also recommend checking your itinerary periodically on the AA website. Airlines do mess around with their flights and it is not uncommon for the systems to fail to tell you. We had one QF flight depart unexpectedly early; and AS has messed us around several times. Each time the AA website went into ‘your reservation cannot be displayed at this time” and we had to call the RTW desk, usually then in turn requiring them to reticket.