Here's a take that isn't based in stats or facts, and is entirely anecdotal. Back when the team was in a will they/won't they between who to sign or trade with Miller and Horvat, I thought it should be Miller then, because Pettersson strikes me as the type of player who's better when he's the guy.
Of course Miller elevated his game and changed my opinion drastically. But I come back to it, I thought they should trade Miller so that the team could become EPs and everything would run through him (and Hughes) i think he excels in that position and having Miller there kind muddled it. He willingly took a backseat to the louder voice, bigger personality, etc.
If Miller goes maybe he'll adapt. Or he'll stay the same frustrating player he's been this season, outside of some glimmers.