What if Rochelle and Mike didn't UTurn Jeff & Lyda
What if Jeff and Lyda Uturned CJ and Libby
I think if Rochelle & Mike hadn't U-Turned Jeff & Lyda, J&L would have still been eliminated. They were on their 10th trial in the World Order Detour while Libby & CJ finished the task after 8 attempts. Jeff & Lyda took a total of 23 attempts, probably at a subtler pace, to finish so I think regardless of Libby & CJ's Tokyo tram fiasco, the amount of trial and errors still would have done the older dating team in.
However, if Jeff & Lyda U-Turned Libby & CJ instead of Jeff & Jackie, then Libby & CJ would have been eliminated.