In my experience, only the AA RTW desk is up with the rules and even then some of the staff aren't without their misinterpretations and misunderstandings. The problem as I see it is that the rules are very cumbersome and complicated. As numerous posts show, it's almost luck of the draw as to the outcome you get. In my most recent experience with a DONE3, it took me an hour to convince QF staff that, yes, geographically Morocco is in Africa but for the purposes of the oneworld Explorer, it's considered part of Europe/Middle East. Even on Qantas's own oneworld five stop award (frequently used for round the world redemptions), agents often don't know the rules and that's Qantas's own product.
Oneworld either needs a dedicated desk for these types of fare products or each carrier needs to have dedicated staff whose only job is to deal with these tickets.