Thank you for your Application.
Usually I write here something about participating in jobs and plotbuilds to increase your chances to get Artist, but would not fit here. I think you are the Adventurer who is most active with building atm. Probably you have build more houses at CoL that most Artists
All I have seen so far in Moria looks very good, and your great teamwork with Patrick is a big plus imo. Also I love that mural.
Your Wellinghall Themed-build shows already good terrain skills. The shape of your mountainside is very good and you used materials for a nice transition from flat to steep stony terrain. At the cliffs, especially the first two pictures I would not mix in the granite block. The texture is supposed to be eroded, broken stone fallen down from cliffs. In the cliffs it is better to add some coal blocks or stained clay which have more similar textures to the ordinary stone. Also I would not place single blocks but small patches or lines of the secondary materials. Look around at Andrast mountains for example. This is only a small detail.
The main thing that could be improved at your Themed build are details. Terrain is very good, but it looks very empty. You should try to add an interior to Treebeards home, stone vessels and a bed. Outside you should try to handbuild some nice trees at the lower levels and also make undergrowth, bushes, flowers, fallen trees, ...
Last thing is the riverbed, I think you used almost the same mix of materials for the riverbed and the surrounding terrain. Would be better to have them more distinct, try to use darker materials down in the riverbed.
This may seem quite a lot to improve, but its improving on a high level already. Keep up the good work