I think that they didn't bring it back because of ARR zone flying. In order to get credit for any quests involved in it, you would need to have the status effect of Hoofing It which prevents flying, but that wouldn't stop people without the quest being active from just flying up there and trolling the jumpers by blocking the path with giant mounts. Bringing it back onto the map is probably relatively trivial, but they'd also need to hack in a flight barrier.