I don't know why this was moved to the resort board when it is a park question.
While there is considerable construction going on, it is not affecting the entire park. Avatar land construction is away from the rest of the park, so you'll only notice a few cranes in the distance. The Rivers of Light construction is the most disruptive, since there are walls up along the water, narrowing the path in several places, especially when going from Asia to Dinoland. Discovery Island has some walls up as well while they continue to refurb a few of the existing stores. Aside from that, there's not much construction actually inside Africa, Asia, or Dinoland.