I do agree that it takes a lot of clicking to clean up an area, and it would be good to have a way to move items directly into the inventory from a structure. In that case, I would add a way to move items from the ground to the inventory as well. For conveyors, I could change it so that the conveyor belt starts at the largest size , because I think most people use the largest size most often.
I'll see when I have time to make these changes. I do think that it would be better.
Edit: I ended up adding the stuff right away. V9.5 is out now.