I never liked that Dagobah's background was always changing its look, felt like the mattepaintings where drawn by different people on each scene (Also, it looked very different when there was no background, just the smoke on the set)

But i liked how Dagobah almost always feels like the "sky" is dark and the land is white. Feels like the trees grow from the sky and "grab" the land with their roots. Also it gives that heavy atmosphere.

So i agree Dagobah would need a change on its backgrounds to tie them with each other, but i dont really like Angel's concepts, they look like King Kong jungle. Also, seems like you are running out of trees :) both images have the same trees on the background.