I think it is just differences in what people like in games rather than overhype! For me I thought POE2 was a mess and didn’t finish it, but others put it among their top games! In contrast BG3 is one of my favorite games, and some don’t like it.
I haven’t reached Act 3 yet, but I am loving Act 2, especially getting new companions, the shadow curse plot, and seeing npcs from Act 1!