One thing that isn't covered but I feel sure I have heard before is that you only get bounced down one level if you fail to meet the requalification criteria at the end of the year. Is this still the case?

(I have EXP, but due to a reduction in travelling I have put all my miles on CX this year to keep Diamond. I put 4 AA metal segments on AAdvantage. Will I get bounced to Plat or nothing?)

One other comment: in the fares table the references to "oneworld explorer" should be more general - they (A,D,L) are the booking classes for a number of OneWorld fares (Global Explorer, Circle Trip, etc.). Note also that the economy fare for OneWorld tickets is now L not M.