I'm a bit removed from some of this. What are they doing with the hub construction? Just changing the look?
Major rebuild to add additional sidewalks to route guests going to other areas away from those
who are standing awaiting and watching the parades, castle shows, and fireworks.
(Some of which are still under construction.)
Added space for those who do want to wait and watch those shows,
including adding two new major enclosed spaces for fireworks FP+ viewing.
(Which are completed and in use.)
Below is a "work-in-progress" of my overview of the new Hub.
Some of the "outer" sidewalks shown have not been built yet.
Some of the unfinished areas have since been finished.
Again, a work-in-progress, all the way around.
The original photo is by Scott Keating, posted on WDWMagic.
And, below is a (very rough and lacking detail) artist rendering and animation comparing the before and after plans.
Artist rendering by wdwmagic