Like 99% of others who've posted here, I don't have all the information on this incident, but from the limited information I've seen here, and with 12 years as a captain on the 777 behind me, I can't see that the crew did anything wrong.
I am not technically competent to be able to question the decision making process behind any PF/PNF on any given day, however I do wonder had there been a negative outcome, would the decision to continue have received similar support. Whilst response to such questions are axiomatic, it is difficult to comprehend how interpretation of the same 'system event' reporting degradation in control logic on a modern aircraft, would have some continue and some return.