Just read on Miceage that Carsland's main thoroughfare is being resurfaced due to the sinking of the surface below structures like manholes and drains, which is a problem as guests could trip over them, and that John Lasseter and Co. are onsite to supervise this, (though it sounds like a pretty trivial repair to me if they make it look aesthetically the same as the old walkway).
Though most guests don't know it, most of Disneyland's walkways are made out of a material that has more give than pure concrete, and helps guests walk a long distance before their feet get tired. I was very impressed with how comfortable the main walk way in Carsland was, and obviously it is a whole lot more comfortable than asphalt, and more comfortable than a lot of the walkways around DCA.
Kinda surprised that Lasseter and Co. are supervising this project.
With regards to the de-forested berm which is plainly visible from the Mark Twain, its been this way for years, sadly. Can't help but think that Disney isn't paying the tens of thousands of dollars needed to fix it as this area of the park could potentially be used for a Frontierland expansion. Why spend tens of thousands on a tree that will only be dug up in a couple years? Though obviously some shrubs/tall plants could be used to help restore the visual berm.