For example, the scene (we can see it in the trailer, so it isn't really a spoiler) where Chevy Chase trips and falls down and then says "Sorry, I tripped over my penis."
Umm... people did NOT talk like that in the 1970s.
This is supposed to be October 1975, the first SNL EVER is about to premiere.
In the 1970s, people did not use the word "penis" like they do now.
He would have said "Sorry, I tripped over my dick" or "tripped over my cock." Very Playboy/Penthouse/Hustler now, but regular statements then.
It didn't enter popular vernacular to mean the other word(s) for male member until about 25 years ago.
Also, some other scenes should have been more male chauvinistic in nature, because even though the ERA and "bra burning" were at high points in society, and shows like "Mary Tyler Moore" and "Maude" were popular at the time, men still 'creeped' on women like they were taken directly out of "Mad Men".
For example (a spoiler alert), there is a scene where Milton Berle is flirting with Chevy's fiancee/girlfriend. The most outrageous thing Milton's character did in the movie was unzip his fly and whip out his umm... unit. The real Milton would have done worse. He would have asked her if she wanted to "touch it" or even do more, because Chevy wouldn't have been able to 'satisfy her' like Milton would have. Yes, Milton Berle was that savage and his talk was much more banal than what was shown. He was as profane and mean as Don Rickles (another comedian of the era).
I grew up in the 1970s, I knew how people talked and acted. This was very watered down. They should have seen some of the movies of the 1970s as an example. However, even those were relatively tame to how things really were.