Plankcap - Not wanting fact to ruin a good story, if you read the FCI they effectively say that only Logged hours count toward the absolute maximums. Therefore as augmenting pilots are only allowed to log 'time in seat' or 'stick time' then it is those pilots with a lot of augmenting flights who will be affected. That is the 340 F/Os mainly. Also anyone nudging 900 hours can expect rosters full of JFKs, SYDs and MELs. The 66%/50% figures you quote are for planning but don't relate to what you can actually fly - you can actually fly a lot more!
Clearly EK (and if we are to believe EK, the GCAA)are wrong in doing this as logged hours are different to 'flight time' as defined for the purposes of maximums.
Can I suggest you write a politely worded email to mgmt asking for clarification of the FCI.