I really don't believe in position-less basketball. The top teams usually have clearly defined positions. I know Warriors started a dynasty with it, but when KD joined. It was clearly position based. I feel it's a notion to get by with not ideal size trying to overcompensate.
Zion at the 4 needs to be dead. He needs to cut weight and be a power wing. You have a stretch 4 like a Lauri that's primarily catch and shoot. A real PG. A dynamic 2 and a simple rim protecting 5.
Zion needs a stretch 4 way more than a spacer 5.