Thanks for playing the game and thinking about a feedback that will help us improve the experience for next versions.
I get that playing it again from the start is pretty frustrating since you already know points about the story, we'll need to tackle that issue if we decide to take this idea to a full release, this feedback is pretty good.
Yes, the answers you get from those people changes the endgame, and if you ask someone about two specific evidence/person you'll get a confession that makes it clear what happened when who you'll should accuse. This will give you the true ending.
Your feedback is really great and has opened my eyes to many possibilities, so thank you very much =)