My cats couldn't care less about their cat tree.
This goes for Edwina too. She had a lovely wood and carpet tree. It sat in front of a upstairs window so she could look down on the yard....Once in a great while she could be bothered to get in it. She felt for window gazing the sill is just fine and she gets a better "up close view." And for playing... isn't that what the lovely green wingback chair in the living room is for??

I gave the tree to my mother-in-law. Her two cats LOVE it!