Bill can reduce that to a sentence I can understand? Your saying your summer time has to give you all the lateral "g" grip your car can develop or your not happy? Are you driving a optimized racecar during the summer?
Being a life long moto guy (street and dirt) tires are the defining interface. Traction. Everything works from that.
If you are not using a winter specific tire in snow country, regardless of your platform type (fwd, rwd, awd, 4wd) you are not enjoying all the benefits possible, particularly your safety. Why compromise your Audi with a lessor tire?