It would be nice if there could be parts underwater in next expansion or perhaps the one after that. I seem to remember one of the books saying there is some subspeces of dragons in the water.

Or swimming under water, in humanform.

That`s a brilliant idea! How didn`t i think of that.

Careful my head might swell ;P

One thing that is great about the Divinity series is the fact there are parts of the game that will talk of other parts of the world that are unplayable. In Divine Divinity there was the npc discussing a submarine adventure to a deep underwater kingdom and the type of creatures that were found there.