All they said that is possible to look into that in the future, but that is it. They usually don't give much info until things are confirmed and ready. So doesn't mean no but not yes either, more like a maybe for now as they said the door is open toward opening all the oceans.
Sure it would be nice and handy; but since we can world hop and plan on my sims living in Sulani for awhile, I am not too upset about it either. It would be more upsetting if you couldn't just go to any world.
Also, the same thing happened with Sims 3, they patched it in around Seasons I believe. Every so often they will patch something from expansions in later or around that time to improve on things.
