I would like that you bring something that you can interact with the ocean. Maybe go diving ( but shark still attack you ) with a harpoon or something. Maybe a sail which drifts you in other oceans.. maybe with ice peaks. Or that you find a lonely island ( just a small island 3x3m ) and you can swim to the island but with a timer so that you can only be 1 minute on the island.
i would like aswell some stuff to build a house.
And some "technical stuff" when you are in the Sun = water goes faster down. when youre in the shaddow it goes slower down :D
BUT AWESOME GAME DONT GIVE UP :D