"Climbing"? Do you mean jumping up on weird places and "climbing" onto higher things? Climbing sounds more like it would be super clunky in an MMO, the jumping up on things works better, plus flying mounts are coming out in the expansion so it's not like we will need climbing.
Swimming brings in other issues, like UNDERWATER BATTLES. Those are completely broken and the "breath" percentage is completely dumb in a RPG.
