As I typed yesterday, the focus bracketing update works exceedingly well when photographing a subject that is on a low horizontal angle, but doesn’t do too well when your subject is vertical to the camera/lens.
Gear used: Olympus OMD EM1, Zeiko 12-50mm macro function lens. ISO 400, 1/8 exp, f/8.0. Processed in Photoshop CS6, loading into layers, auto aligning, auto blending.
Auto Focus Bracketing, 30 images, 4mm differential.
Manual focus bracketing selecting 30 focal points.
As you can clearly see, the orchid in the 2nd photo is sharper all over, whereas the Auto Focus Bracketing left a goodly amount of the image blurry. I’m quite sure that with a bit of erasing certain parts of the Auto Focused layers, you can get the same results, but that is for the more adept and patient photo editors.