Good question. The short answer is: No, I generally don't do that.
The slightly longer answer is: In rare cases, I do go back and rephrase a few lines of dialogue here and there - if they stick out particularly badly.
While I do feel the same as the other dev, in that my early scenes feel very subpar to me, I don't think it's a good use of my time to go back and rework them.
Early-game reworks aren't exactly uncommon in AVNs, but as a player myself - and based on what I've heard from other players - they're generally not received very well, especially by supporters on Patreon and the like.
Sure, it's nice to spruce things up a bit, but for someone who’s already seen the early content, there's little value in slightly enhanced visuals. And new players won't exactly notice the difference if they don't know how it looked originally either.
Now, you could argue that a polished early game might hook more players - especially in a mostly linear VN like CH - and I get the appeal. After all, Junichiro being more hateable or Suzu more adorable could tighten the emotional beats. But in my opinion, it's a slippery slope. You risk sacrificing current supporters' goodwill for the hope of impressing newcomers. That tradeoff rarely pays off in the long run.
The way CH's quality increases throughout the game is a testament to my own journey as a developer. Once the story is finished, I'll have a complete game, as well as a lot of experience to bring into my next project.
Yeah, CH as a whole isn't perfect - I had (and still have) a lot to learn - but that's life, isn't it? No point in fretting over it - especially if it means basically exploiting my supporters' patience and desire for more content, when I could instead just keep going, finish the story, and then move on
I hope this answers your question :P
Also, the 7th isn't that far off anymore :)

Ghm, but what about fixing the spelling? Right now we have (for example), "behaviour" in one scene and "behavior" in other.