You have to understand why Apple dropped Google for many things. Steve Jobs befriended the founder of Google, put him on the board, and mentored him. Jobs was repaid by Google using their inside knowledge to undercut Apple by bringing out Android after promising not to compete with Apple products. This happened to Jobs on more than one product. Enough so, that when the iPad was developed, Google was locked out of discussions. The dropping of Google maps is one of the last vestiges of the old agreements with them. Apple does not plan on locking out Google, but will never give them any advantages over their competitors.
I know about the bad blood between Apple and Google. That doesn't change the fact that a feature that I use disappears with iOS 6.