Because he's a faster Clinton Portis, with less physicality. (blocking)
Last year he ran well for us, he does what Bush does not, one cut and go forward, no dancing. Our olineman loved him because he would just make that cut and go, he hits the hole like he's supposed to. Bush of course would dance and search for the big hit, Miller's not like that, least not yet.
And as I said, almost no one talks about him, so he's perfect for breakout role. He's that guy that doesn't get drafted in fantasy, has 2 big weeks early, and everyone races to pick up.
I hope. Cuz if he fails, Tannehill pressure builds, and then a lot of fail could follow. Together, they should help each other pretty good.