I admit to being slightly disappointed. I haven't really kept up to date with the announcements, only heard that the Rival and Hate routes would get caught up to the rest. I wasn't expecting much—maybe one or two new scenes on those routes, as they had the least amount of content. Unfortunately, they have nothing new, just the same as the other routes. They were more divergent at first, but feel much more streamlined now. Nothing has transpired in-game that differentiates and drives them forward in a long time. You actually forget you're on a different route because the scenes are more or less the same.
I can't comment on the music or achievements because I always mute these games, listen to my own music, and don't waste time on achievement hunting.
Tbh, it's mostly my own fault for not managing my expectations based on available information. But with the steam business now over, I remain optimistic about the future development.