A mask only covers the face. What about the arms, knees, ankles, shins, etc.?
Backing the mound up isn't as good of a measure as you would think either. First, the further away the pitcher is, the harder is becomes to be accurate.....that's why they award 3 points in basketball for the long shots, as accuracy decreases. Secondly, the trajectory changes on the arc, making a 10' pitch easier to square up as it is coming in at a flatter angle. Lastly I'd talk about pitch speed, but I digress.
I don't play it much as it is due to being poorly run in this state, but I don't see myself playing it at all going forward with this bat/ball combination.
Another win for USSSA IMO. Sometimes no changes is better than poor change.