What if Shola & Doyin hadn't gotten hopelessly lost in Namibia?
Namibia - Shola & Doyin don't get lost, they come at least 1 position higher, which results in a Chris & Alex elimination.
Thailand 1 - Cyndi & Russell were sufficiently behind to not bother the situation, Shola & Doyin reaches F6.
Thailand 2 - NEL, Tara/Wil or Shola/Doyin NEL, doesn't matter.
Hong Kong - Mary/Peach de facto surrender, Shola/Doyin reach F5.
Australia 1 - NEL, leg doesn't matter.
Australia 2 - Fast forward NOT TAKEN this leg, possibility for either Tara/Wil or Blake/Paige to take the FF. Either one would get on the first charter flight, although this is moot because they did anyway. Gary/Dave stuff up bigtime; Shola/Doyin survive the leg.
New Zealand 1 - NEL, therefore doesn't matter.
New Zealand 2 - Oswald & Danny start the leg behind, never catch up. It is possible that Shola & Doyin do the same thing, but unlikely. Either way F3 is either made up of Blake & Paige, Tara & Wil and Oswald & Danny or Shola & Doyin.
US 1 - NEL, doesn't matter.
US 2 - On the final flights into San Fran, Blake & Paige stuff up (or was it the taxis?). If it was the taxis, the non existence of Chris & Alex could put them into a better cab, giving them a run for their money. Tara & Wil scream at the random and stuff up. Shola & Doyin could take the place of Chris & Alex and win, or Oswald & Danny or even Blake & Paige. However we wouldn't see the epic footrace.