Aside from drawing attention to your character in a way to say "Hey! Look at me! I'm jumping!" *hop hop hop hop hop* I don't really see where the benefit of jumping comes into play. Are there going to be locations that can't be reached unless you jump? Are we going to be able to jump off of high places and then get hurt? I did that in WoW once, it was awesome until I hit the bottom and got dead.

I think jumping does cheapen the game's experience. I've only ever liked jumping when it was in like a first person game like Mirror's Edge or something where your character had to do some platforming gameplay to collect objects or jump between buildings to catch a guy with a gun. I also don't know why mounts need to jump, but I suppose of characters can jump and there are reasons for jumping to get places, mounts that can't jump would not be able to get over the same obstacles.