Having met and chatted with the CPT AAgent last week, I don't think they're especially overwhelmed by all this. They queue the PNRs to Dublin for pricing, and if some "thou shalt not..." is forthcoming, it's not CPT that's making the call. They're just the messenger and none of us is interested in punishing messengers. Frankly I doubt the clout that OW will have in telling member airlines to get their acts together in the selling of RTWs in out-stations. I can't see this being too high on the list of priorities of Messrs. Walsh and Arpey et al.
There's rules and there's life. Having some BA station person tell you that your bags can't be through-tagged to a Oneworld partner can be a source of (a) impotent rage at them ignoring a OW and BA rule, or (b) a knowing nod and acceptance of that's the way things are. Sort of like advance seat selection with Iberia.
I'm not saying we shouldn't lobby for consistent application of the product rules, but who's going to volunteer to be the hero that gets IB to issue a DONE5 in Joburg? Or Malev in Tel Aviv? Not me, pal.