I think the first image posted just has the saturations unnaturally high. The sky is just too blue, the greens too green, etc... It's not horrible, it's just a bit over the edge. The edit really brings out a bunch of white pinpoints as well. I find them distracting.
In terms of composition, you have a lot of things leading the eye toward the center of the frame -- the road winds around toward the center, the tree leans in ot the center, the eye gets to the center and there's... nothing. I think this is why it lends itself to being criticized as busy, primarily because it doesn't have stuff going on where it should.