My family was at MK in September. I never mentioned anything to my wife or two boys about the construction project. Two full days in the park, none of them ever made any comment about the hub construction. For the average guest, the construction walls fade away. You don't spend your time looking over the wall, you look at the castle or what you can easily see. Those posting on this site are looking for the diminished experience, the vast majority of the 27 million visiting the park either don't notice it or are unaffected by it.
You can choose to see the glass as half empty (diminished experience), half full (new projects or parks getting TLC), or just enjoy the glass of water (your in WDW). Most people at WDW seem to fall into the last category!