I have to admit that I'd love to interact more with the characters, in perhaps a non-meta version of the game, where the President isn't self-aware... In the end, it just feels like we didn't get enough of the girls, especially Sayori. Though I suppose it's better to have the game be focused than to risk ending up with something that's all over the place.
But wow, in the end, it wasn't since Undertale that a game impressed me like this. That song at the end... makes me just as melancholic as the ones from Undertale...