well the 6th (or was it 7th?) level has water, so we could have boats, but whether or not it\'s big enough to fit trading galleons, and war galleon and sloops and brigantines and enough other random ships (no aircraft carriers or battleships... or any other modern ship...) to have an atmosphere of \"the big blue ocean\" is up to the devs. Then again, yliakum could be massive and larger than the galaxy we refer to as the Milky way so I\'m not sure... but it would be fun to be attacked by pirates while innocently moving a shipment of spices somewhere (/me thinks about shipboarding and hand to hand combat and an interesting player history that has something to do with pirating)
as for planeshifting, only those trained enough in the ways should be able to shift, or open a portal to let them do that. (how would a brainless warrior learn to open a portal to the land of flying penguins?) and then those who are not trained enough might mess up and shift into a volcano and burn... but those untrained could shift in special cases like death (if that counts) or someone using a spell to shoot them into the twisting nether...
but then we\'d have to make spells, effects, formulas, graphics, a system, etc. so planeshifting (and every other wildly elaborate idea we might have) could take a while to implement.