I agree, class specific animations to scale obstacles would be nice.
Including jump wouldn't necessarily fix "annoyances" people have regarding terrain navigation. Surely it would just be easier to implement an ability to walk off cliff edges (as long as you are not too high - else you could take damage or die), climb up ledges/walls, or automatically jump a gap? If it's done correctly, that would surely fix issues of navigation.
Someone asked why some emotes were included and jump wasn't.....I find people bouncing around everywhere like Gummi Bears a little more distracting/annoying than someone continually stretching or doing another emote.
If you were looking to implement jump "fairly", all races would have to be able to jump the same obstacles. That would mean either Lalafell being able to jump like 10 foot vertically to match Roegadyn, or Roegadyn can only jump a foot off the ground. Either way, it would look silly. Just putting it in as an animation for the sake of it seems pointless to me. There's plenty of other things SE have to get on with without overburdening them with (currently) unnecessary things.