HEy susie. black and white thumbnails are good. Let's make everything more unified. Define the ones that need more detail. Since you have so many forest area. I think we;re good. Let's clean up the mad hatter house render and think about some unique area in the story also one more interior that shows entire structure of some castle or room. I know you did queen's throne. It is more an illustration. I attached the sample below. Let's do some wide inteior shot as below. For these, do some pen a nd ink line thumbnail rather than photoshop bw.
For charcter, Let's do the Lim's paintover pose. You can add more detail and change some texture But keep the contrapost gesture as she did paintover.