It's not even a mandatory 6 game suspension.
From Goodell's letter:
Which really means "Six games is the starting point, but if we decide she really had it coming we can lower it." It was a wishy-washy statement that meant nothing to get people to stop complaining about the suspension by making it seem like they were doing something. Based on this, the NFL could hand out another 2 games for the next first offense and still be following their Personal Conduct Policy.