I think women’s suffrage is more of a reflection than a cause of a long term trend. Although it may not seem that way at times, there has been a tendency toward more humane behavior. Over the centuries, the homicide rate has been going down. Slavery has been eliminated in most places. There are laws against mistreatment of animals. While racial and ethnic prejudices are still widespread, it is notable that we have laws against them. 1000 years ago, such laws would have been unthinkable.
As for female voting patterns, I think there is a tendency for women to vote more progressively, but I don’t believe that their vote has caused things to be much different than they would have otherwise been.