That's amazing because I wrote a paragraph about the XDS interaction being another factor in all this, but I decided to delete it - as it was more of a rant against Audi's over-engineering although I do appreciate the sophistication in other areas. Basically leaning too heavily on electronic systems to compensate for the lack of mechanical solutions, but then that is the Audi mythos.
Anyway now I have fresh tires, brakes and pads, the whole system feels hyper-sensitive, which makes me tempted to start experimenting with XDS adjustments with OBD11 to fine-tune how it all comes together. As it's rather unnatural to lean on a brake servo in a corner instead of leaning on a tire, this blanket is veiling the true performance of the Pirelli PZ5.