Distortion is always more noticeable using a wide lens close. Like big long noses in portraits. . Yes I notice the DP2 does show up much more than the DP3, which seems to have very little distortion, which is in line with the longer focal length. I have PhotoNinja which is quite good and easy and Cs6 if I take the image from Bridge with the option into Camera Raw where there is the opportunity for manual correction.
I've no idea if SSP has an auto correction. . I am trying to open SSP while writing to have a look, so it will be while before I can find out
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Could not see anything.
Auto Sharpen ???? Smart sharpen