No, you should have more quests to do in Ul'dah even past level 10. Have you explored all of Western and Central Thanalan? I was questing all the way past 15 until I had access to the airship for other areas and I started spending more time doing levequests and FATEs. If you have no more quests in the city, check to see if you have any new quests in Horizon. I can't remember what level those quests started at.