The new ground tiles you made look really nice to me!
I would recommend that you rebuild the scene you did before (with the building in the middle) but replace the ground tile with the new ones, so you can really see if they bring the wanted variety.
The new shading on the tree looks much better now, but i felt like the colors of the stump looked kind of washed out compared to the leaves so I made a quick edit to see if it looks better if you increase the contrast of the stump.
I also tried to tone down the contrast of the outlines of the leaves a little bit as i felt like it may look better that way.
Here is the edit:
![](http://i.imgur.com/DgOi0Ee.png)
To recap:
1. The first one is the original that you posted
2. On the second one I only increased the contrast of the stump
3. On the last one I changed the contrast of the stump AND the leaves
Finally I decided that I had to try and edit the contrast of the alone standing stumps as well and compare it in an image:
![](http://i.imgur.com/rovnaeC.png)
I hope I could be of help!
![Cheesy :D](https://pixelation.org/Smileys/snake/cheesy.gif)