As for aftershocks' other points, there is a rumor that the producers did not want Charlie in the final (EMPHASIS: this is a rumor). Posted more info about that on Goldenskate (I know there are people active in both communities, so I won't rehash all of that here).
Re Sharna: Sharna seems like a taskmaster, and her two previous partners were Keyshawn Johnson and Andy Dick. I think she works best with non-skilled dancers who need to be whipped into shape. Maybe she could have used a lighter touch with Charlie? That being said, she and Charlie seemed to get along well, and I didn't have any issues with their chemistry.
Re previous wuzrobbed celebrities: I agree with the posters who say that Zendaya should have won her season. Shawn should have beaten Melissa during the All-Star season as well, but I think that the voters really wanted to give Tony his first Mirrorball. I'm okay with Emmitt and Amber's victories, though (Mario was too arrogant, and Corbin had studied dance with Debbie Allen).