Oh dear me, the whole thing suffers dreadfully from haloing. It's not as obvious in v11 under the grain, but it's there. Here's my comparison - v11 on the left side, v14 on the right.
https://drive.google.com/file/d/0B5kn2qv4CCwWM2JSMWUwalZ2bUU/view?usp=sharing
Still, the algorithm has done a superb job at reducing the aliasing, so there's a start.