I don't think the Rockies will lose him to the Dodgers and I don't think he's overrated.  He's leading MLB in RBI's and his glove is one of the primary reasons the Rockies have been at the top of MLB in fielding.  Even the Monforts can see his value and they will sign him to an extension this winter.  Besides, the Dodgers already have a pretty good player at 3B in Justin Turner.