The differences in frequency of pitch locations aren't that stark to explain why Hardy has struggled so much, IMO.
I think he's just not hitting as well this year. The different approach pitchers are taking may describe some of the dropoff, but it's not a major factor, IMO.
Here's the percentages of pitch locations from your chart for 2011:0.81 2.16 1.08 0.81 0.54 3.50 6.20 10.51 4.85 2.16 2.96 7.01 10.78 11.32 2.43 1.35 3.77 7.55 9.16 2.16 0.54 0.54 4.04 2.96 0.81And here it is for 2012:1.27 1.27 1.27 2.12 0.00 2.12 3.81 7.63 8.47 0.85 2.54 5.93 9.75 9.32 5.08 2.12 5.93 6.78 9.32 4.24 0.00 2.97 3.81 2.54 0.85And here is the difference in those percentages (not a percent-increase, just the increase or decrease in the frequency for each location):0.46 -0.89 0.19 1.31 -0.54 -1.39 -2.39 -2.89 3.62 -1.31 -0.42 -1.08 -1.04 -2.00 2.66 0.77 2.16 -0.77 0.16 2.08 -0.54 2.43 -0.23 -0.42 0.04
None of that really strikes me too strongly as a major shift in the way pitchers are pitching him. He's just not hitting as well in just about every zone, which to me indicates a more all-encompassing issue, which could just be as simple as saying he's having a bad season.
Hardy (and Jones, for that matter) are getting colossally unlucky on line drives. His xBABIP is around .260 right now, which is around 30 points higher than his actual BABIP. This is largely driven by the fact that his BABIP on line drives is .585, or .180 lower than we'd expect. You have to think he's better than this.