Korean Air changes name, without any 'Korean'. That will make them look much safer. 2 of their accident during last 20 years caused by N.Korea.
Invite other carriers, even 'steal' other alliance members. I think the best selection will be TG(SQ is better, but too hard to wish), AZ, AR, MU. 9 is enough, but if still short, Royal Air Maroc for 'fill'.
Delta Go North; with only ATL, no expected Canada Partner, Poorer connection between USA and France/Korea.
AF cuts all connection with CO/JAL. More Seoul-Paris flight. As BA in OW, AF is most likely to be a trouble-maker.
SA; Current best, except for NE Asia (NH is only 4th or below in this region). Just make more stable.
OW; More need to be stable than SA. Problem in Eastern Asia, especially no entrance to China is weaker than first one. Invite OZ for Solution.