I played this game in Japanese back when it was released. I think it's really good for what it is (short-ish cheap mind control game).
MTL will inevitably take away some of the flavor of the original text, but hopefully it's still worth it. It's encouraging to see the modder stick around and fix issues instead of dropping the MTL and vanishing in thin air like in most threads like this, but GPT-3 has its limitations no matter what.
One thing I liked About the game itself was the attention given to the mind control tech and the characters' backstories. Like in a route the protagonist has less time and resources, the brainwashing is rougher and more rape-y, in other it's more memory manipulation and stuff, and all the while there's this background built up about Shion's past, where her abilities come from, what's Karin's deal and whatnot, and builds things up for the secret route. It's not much but I thought it was pretty cool given how most of the time Orcsoft games are a lot simpler and more linear. Kept me curious all the way beyond the already excellent sex scenes. That ending in the brothel is just top-tier both writing and art.
Also Shion is so damn hot. Misonoo Mei is such a good VA too.