It sounds a little odd saying it, but Miller is currently our "3 and D" guy. That role is becoming more and more valuable in high level basketball. The guys that are elite athletically, that can guard multiple positions, and make open 3s, are all being coveted by NBA GMs. Obviously Miller isn't THAT type of 3 and D guy, so its strange to label him that way in todays day and age. But for our team, those are his roles.
Miller is reliable, and solid in that role for us. He's not a game changer, like someone like Jordan could be. But he's also not going to blow assignments, and leave TJD more vulnerable on the back end. He's also not likely going to turn the ball over much.
Miller covers up for, and compliments our two most important players very well. He's integral to our success this year.
But others are too. We absolutely need a couple guys like Tamar, CJ, Jordan, Trey, etc... to step up and provide what they're able to provide too.