I really like all of this, mostly because the Feywild and Shadowfell sound way too much like my own homebrew. Two planes which overlap with the physical world, a Spirit World and a Shadow World, filled with spirits and undead respectively. The Oriental Adventures Spirit World mixed with the shadow plane, the classic mystic land of the Fey, and a bit of Legend of Zelda Sacred/Dark Realm. I like it a lot, and love all the possibilities in it that can't be found in the Great Wheel setup.
Imagine wandering into some small hamlet, built on the ruins of some ancient city, and the wandering into the Shadowfell, and finding that ancient city still stands there, filled with whole generations of its now dead citizens, and ruled by a council of its undead kings...
Or you can retread the waters from old celtic myth, and accidentally wander into the realm of a otherworldly faerie king because you fail to follow a common superstition.
Also, I like the Elemental Tempest and Astral Sea. Far more flexible and interesting than Inner and Outer Planes. I am also glad they are minimzing the term "plane".