The tree one, using the REAL tree, or the cubistic one you added?
I think the real tree one is ugly as is.....but I am kind of thinking how one might use a natural object, and add cat possibilities to it, while maintaining the beauty of the natural object. As cats do all the time when allowed outside...they make all kinds of viewing spots and perches...usually kind of hidden, unless they are sunning.
Osso, yes, they love to scratch, and need it in their play equipment.
They do love to look! I like my evening walks, because so many cats are just hanging out on their walls, or on the footpath, watching the world go by.