I fnally hit 70 today \o/ though I noticed it was a little slow because story quests were green cause I managed to get 68 through time walking.
I put a post up about it in the quest forum a little bit ago but no responses yet. Could this be a bug or just something normal the first trip through?
Dragon flight story quests going green - Gameplay / Quests - World of Warcraft Forums (blizzard.com)