Michelin PSS worse than Conti's isn't normal and outright bizarre.
I run 35 psi in the front and 37 psi in the back cold and they're great like that. You might want to try that.
When I had PS2's, one thing I didn't like was that the softer sidewall didn't make the car feel planted in long turns where the ground undulated. The ultimate grip was there, but the "feel" wasn't as direct as I liked.
I find that the PSS's alleviated that issue I had with the PS2' AND offered more grip tool
Best of both worlds!!!