RWG looks very promising -- we didn't see any worlds, but we saw the tiles and they are awesome. It is supposedly much faster.
There's a ton of new content. 145 new POIs and rising. Plus a lot of POIs redone.
Almost 1200 shapes to choose from when building.
Zombie models redone.
Little actual change in gameplay, though. Crouching zombies, feral sense, restore power quest and one way doors are all I recall.
The drone is coming, but it's essentially a pack mule/medic.
Harder survival. Less food, less honey, more infection. Loot tables redone, but not trader's. This might well have a bigger impact on gameplay, imho. It might force people into doing things differently.
Lathan is a spoilsport.
One can make a pipe gun on day 1 or 2 (allegedly).
Shape menu:
POI with all shapes: