regarding the studio, I would rotate the bed to free up some more room, shift the furniture towards the window a bit, and then add a kitchen cart in the kitchen area to create a sense of separation between the kitchen and living areas. Also, taller bookshelves to add a dimention of height and to create more storage space.
I played with some room dividers but nothing really worked for me. Now I'm kind of used to the space being wide open. I've moved the bed and furniture around a couple of times. I use the open area in front of the window for painting.