Essentially routes that require more than ETOPS180 are confined to Aus.and NZ
to South America and to South Africa . If any carrier was certified to ETOPS330 it would be a non-issue, or the fly-around distance would not be significant. However I don't believe there are any carriers with better than ETOPS180 that operate in that part of the world.
There is a part of the LAX
-PPT route that exceeds ETOPS180 but when NZ
flew that with the 767 they flew around the limit. It added something like 200nm to the trip.
If the new standard adopted by the FAA in the U.S. is adopted by regulators in other countries there will be a list of conditions that will apply to aircraft irrespective of whether they have two or twenty engines. Some have to do with the route that the flight is flying. This is particularly so with trans-polar flights.