Flannum claims that there will be "a lot" of underwater exploration, and it will be possible for all races and players. "It's going to be really easy and accessible for players to go underwater. In a lot of other games you see the underwater environment as this really hostile environment where you have to worry about running out of air constantly and you're always on the verge of dying, and that tends to make the area less fun. We really want to emphasise the fun, the differences, the change of pace of going underwater, to encourage that exploration."
Discuss that interview here.