Just as a note the PP2 will not just have new tires. Ford has worked some on the chassi, nothing dramatic but still changes. Stiffer sway- bars, stiffer spring-rates, re-mapped magneride tuning and quicker steering calibration. These modifications should resolve the issues MT mentioned in the H2H with regards to the car being to "loose" not sure if bushings etc have been updated as well.
Also the aero might prove to help, not on the salt lake though
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What Ford also should have focused on would be the weight. The wheels are heavy and the rotors are heavy. A 40lbs of unsprung weight would easily be shaved with other wheels and rotors.
Anyhow if all these changes will be enough to make the car more agile and fun time will tell and also if it can stick with the mighty 1LE.