If Monty does plan to play him at the 3, I don't get this signing at all. He played stretch 4 his final season in Portland and the team thrived with him in that role. Miller has the backup SF role down and can actually guard the wing.
I just won't believe it until I see it. He is a stretch 4. If Monty thinks otherwise or plays him at the 3, there will be another thing he does that I can't explain/defend.