Sagan, like a lot of public figures, had a public and private persona.
I have read up what is available, and he could be a jerk and be dismissive and occasionally rant. Especially later on in his life.
In a time of ready and active social media, I think he would not have been as polished as we like to picture him.
I don't know how he would have handled feminism. Certainly Ann Dryan is a strong figure for feminism and the sciences. But feminism has changed over the years, and of course her views wouldn't be his.
From what I understand, it was Druyan who made Sagan reconcile with some of his children and former wife. But yes, reading up on Sagan's personal life definitely shows that he had some dirty laundry. Like we all do. According to what I have read (though I have not studied this deeply), Druyan made Sagan more humane and less arrogant than what was the case before.
Sagan was an outspoken feminist and I doubt he would have changed that.