he has more points the past 3 seasons than Crosby, Stamkos, Barkov or Tavares over the past 3 seasons, but, they are all better players than Miller.
On the Leafs, he'd play on the LW of either Matthews line, or Tavares's line, and bunting has solidified his spot, so, he'd slot down to #2LW and then, you could hope he'd be complimentary to 2 goal scorers who like to have the puck on their sticks. So, I dont think he works there.
Miller is a very good player, but, he costs too much to acquire, and then it would be difficult to get a good fit on this team, just tossing his name on a line doesnt mean it will work on the ice, as good as it may look on paper (or a video game).
He'd be ideal on the 3rd line LW and he'd give that line some serious firepower, but, I'd consider that a waste of his talent for what he's paid, and the cost it would take to get him on the team.
cost would be better spend on a solid defender who has term left.