ProGrid Omni has always been a solid shoe. For the past several versions, it has offered a rectangular shape and significant anti-pronation control — including a firm medial midsole, firm heel counter, and torsional stability.
Version 11, however, has reduced pronation control due to increased midsole cushioning (thickness) and less torsional stability.
This makes for a comfortable shoe with a trade-off in less durability and faster wear. In addition to the change from support to cushioning, the upper has also changed from a more fitted style to a more boxy style with a deeper toe-box. For some runners, this may predispose them to a less secure fit than previous models as the following field research shows.
Other ProGrid Omni Reviews:
https://drshoereviews.com/2009/11/09/shoe-review-saucony-progrid-omni-8/
https://drshoereviews.com/2008/07/16/shoe-review-saucony-progrid-omni-6-ultimate/
Dr. Jenny Sanders Shoe Blog 
I love the Saucony ProGrid Omni 9. I just purchased the Omni 11 and hate the cushioned midsole, and narrow toe box….the Omni 9 is a “moderate stability running shoe”. Does Saucony make anything like that anymore?