Pantheon: Rise of the Fallen is an MMO in development that is developing almost their entire game around climbing (a little too much). Adding verticality to a game makes the world seem more alive and real. This would be an excellent addition to any MMO's traveling and exploring mechanics.
|Google translator|
I agree that the world is more alive and real with a climbing system, I believe that this also makes room for more dynamic missions, not to mention that the movement of the characters is more natural. A great example of a climbing game is "Zelda Breath of the wild". Honestly, I don't understand why other games don't adopt this system.