BA scrubbed the September launch of JNB-MRU and are now evidently planning on it to start in November/December.

The MRU message is one more reason to think one should just mentally increase the price of any BA-sold xONEx by USD125, have it issued with a dead-simple-no-brainer itinerary, then change it when one can deal with more experienced airline reps. Otherwise you're talking with people who have no experience with one of their airline's most complicated products making judgements based on their reading of the rules.