Novice Review:

Still a good plot, but still needs some work x3 

Your trees are okay, but i can see the world edit spheres in them, so try yo smooth them out as best as you can! Having a higher percentage of air in you brush when doing your leaves will help also. Having more air in it means that the trees will look bigger and fluffier, in turn making it more tree-like! (Additionally if you do [//mask air] when using your brush, it wont ruin the blocks that brush goes on top of x3 ) 

Your structure is still fine, but there either needs to be bigger structures, or more of them on your plot. One small structure isnt gonna cut it, and putting a door on your tree doesnt make that a structure either :p 

Your terrain is nice, but its still too smooth and boxy in some places. As i said previously, you want nice even terrain for plot. 

Good luck