Well if you play from the first game the characters changed. Zoe also doesn't make a whole lot of sense. She is a shy girl with a crush on the MC. Not only that she is close to the family. Is also a close friend of the MC. And now late in the game she is very experienced and known for her deepthroating. Megan comes off as curious at first, exploring... not anymore. She is worried about going too far... and also wants random hookups at a party? She stops vaginal penetration so fast you'd think she has a chastity belt. But that all flies away without a lot of explanation.
This has to do with the character type they wanted... the loser. For an MC you can then start from nothing and bang all the girls... except it can be tiring playing the idiot with no skills when everyone in the game is more experienced than him. Older sister, younger sister, cute cosplay girl, Amy the dream girl. Worse, few of them make sense. Looking at early chapters, why would Zoe be more experienced than Ellie, when she is willing to get banged in the ass by a guy she literally just met?
It is like later in Season 1, the writer changed. Where before there was a variety of girl and experience levels now the only difference is that Ellie never got her cherry popped.