Hoping someone can advise on the latest with AA taxes for xONEx tickets.

I have booked several of these in the past and found it very beneficial to book though AA to avoid higher taxes and fuel charges. I recall last year that this changed as AA started to collect surcharges on all carriers. This was quickly removed for award tickets, but does this still apply for rtw tickets?

It would be good to hear definitively on this! If they are, which is now the "best" carrier to try to ticket on in order to keep such charges down? Thanks.