"The UK fatigue expert involved with the survey commented that he had not seen an airline with such complexity in rostering" GMF. HC.
When PWC came in they said the CX operation was simple and easy to implement a new computerised rostering system compared to other like American Airlines which have far more bases, and aircraft types, flights, destinations, and passengers, FAA, and negotiated rules.
If the "expert" had not seen something like CX before, probably means they never seen any mainline airline before.