Completely agree with you on the Harry part. He is our player character. Since our choices are played through him, if we choose to play the good person I hope we get with an happy ending for Harry. If I remember correctly there will be five Laura endings. Hopefully one of those endings Harry is happy with or without Laura. This is good writing when we can root for the guy created to enhance the cucking experience.
For Laura, it is a common trope in NTR where the woman was hiding her true personality that the NTR revealed. With so many endings, there should be one where she accepts her true self and one where she rejects it. Wonder how each will affect her relationship with Harry? Maybe there will be one where she becomes a more open and sexual aggressive woman and Harry loves the new her? Happy end?