Water DLC
This is probably old news and may have been answered in the past. Do we know if there will be a DLC focused on the water and aquatic life in general?
I could see one working especially if the ocean floor is treated like another layer of the world. Having maybe whirlpools act as the bridges between the ocean floor and the surface or even some passages into the underground could work.
Any aquatic species could start in ocean unless a specific trait is added to them so they could survive on both land and sea.
Also within thr Tomes possibly in one tome or two separate ones we could have a underwater breathing and surface breathing race transformation so other factions could still interact and fight with each other despite one being in the ocean and the other on land.
Food for thought, I would have put this as discussions but I don't see it there so I have it as suggestions.