Is it allowed on a oneworld global explorer ticket to omit segments? E.g. because I spontaneously prefer to travel overland. Or e.g. because I do not know at the time of ticketing whether I prefer one of the (unfortunately too..) limited stops in Brisbane or Nadi and therefore book e.g. Perth - Brisbane (transit) - Nadi (stop) - Brisbane (transit) - Auckland (the price can be the same). Of course this works only if I can choose that my luggage is delivered to me at a transit airport and if the validiy of the ticket is not affected on further sectors.

What I also ask myself: Is it not possible to have an additional stop by changing the date on a flight of a sector after a transit destination?