Sounds as if Ducatti have decided that their GP bikes only speak Australian 
If that's the language they need to get the feedback good on them. None of the other nationality riders they have tried in GP seem to know how to talk to the beast.
Has there been a detailed write up about the specific issues involved and why Casey can adapt while the others (all world champions too!) dont seem to find confidence?...Im just interested in a more definite answer. But I suppose if they knew the answer they would have a solution by now.
Q. What would happen if Casey gets hurt, would they even be in the top 10? seriously?