I've only finished one route, Celine's and while I enjoyed the writing of this route, I was left wanting more because of that ending.
BIG SPOILERS INCOMING
Wish there were spoiler tags but I'm pretty sure there aren't any here. But I feel I have to state this because it's been really bugging me since I finished the route. The ending was depressing imo, doesn't even feel like a happy ending like what your features here stated. All that work only for a meh maybe or maybe not they'll get together in the future. Like there's no certainty at all with these two, even that final CG doesn't feel earned because Celine said it herself, she doesn't feel that way right now. That ending really took the wind out of my sails, I was planning to jump into other routes right after finishing this route because of how much I was enjoying it but yeah that ending really took it out of me. A epilogue would have likely helped, I was really hoping there was one like your other games but sadly nothing came. But yeah these were just my thoughts that I just had to get off my chest. Good writing and route but the ending was heartbreaking imo, too much uncertainty. Felt like I wasn't rewarded at all with a romance even after all that relationship progression. Like yes one solution is that I could make my own headcanon that they'll get together but it doesn't help because no story would ever need an ending if we could just headcanon whatever. That's all I wanted to say, thank you. I might need a break before I even get my hopes up on the other routes and hope they're more satisfying with the relationship ending than this one was. I don't want to sound mean but I really felt I needed to jot these thoughts down. I did enjoy most of my time with the common route and this route but I guess I came in wanting some fulfilling romances haha.