I know there are lots of topics created by people requesting specific functionality from adobe PS. One thing that I particularly like and I do mis in nearly all other imaging editing software (including Lightroom) I've tried is smart sharpening. The sharpening algorithm leads to better results and you'll get blending options to prevent clipping due to sharpening. Of course you can apply this filter as a smart-filter so you'll keep a nondestructive work-flow.
I would really like to see this feature in both the iPad and MacOS versions