I feel for the people who want more racial lore but at the rate in which Blizzard releases content I can't see it being a priority. Gnomes are interesting to certain demographic but I don't think content specifically geared to expand their lore is very interesting to people. Gnomes have been one of the most disliked races since vanilla by horde in particular and a good portion of alliance would probably rather time be spent elsewhere on lore. They feel like goblins in that they are a bit of a joke race that has to compensate for their size with technology.