It feels bad when your side doesn't get to experience the "heavier" lore. I remember feeling that way in WoD when Horde got a throwaway clan of Thunderlords as their nemesis in Frostfire Ridge, while Alliance got to see the development of an actually relevant clan of Shadowmoon and the named Warlord Ner'zhul. Still, had Frostfire otherwise been to my taste (it wasn't) I wouldn't have minded. Kul Tiras certainly looks very interesting, so I think you can live with it.