I'm all for it, the guy is talented on the mic and works a solid match. Wouldn't mind seeing him and Sheamus feud for the WHC.
Jobber? He was the IC Champion. Yeah jobbin' it up. Losing matches doesn't make you a "jobber". Getting your own recurring segment a la Piper's Pit, Cutting Edge, and The Highlight Reel doesn't make you a jobber. To each his own though. I know internet folks get really bent out of shape if anyone loses a streak of matches, whether or not it's meant to tell a story.
I think having Miz get pushed back up to the main event would be a great idea, WWE seems to be lacking solid main eventers at the moment. Sending him to Smackdown is the best choice for the Miz. I feel he would get lost in the shuffle over on Raw at the moment, but on Smackdown I feel he could really shine.. Especially in a feud with Sheamus, because the last two feuds Sheamus has had against Big Show and Alberto Del Rio have been a bit lackluster, so having the mouth piece of the Miz I think it would really work.