This game is crying out for a few "problems" to create some story and some conflict. If it had that it would be good again, I'm happy with the LIs and the paths I've taken - I just want more than bed-hopping.
At the start of the game, it gives the impression you can join the frat - why not allow that and have an early fork in the story? Currently, if you don't save Ashley from the sorority, you barely see her again, except for coming out of a room at a party with cum dripping down her face. Where's the option to get in on the other side of that story? It could be "your" cum Ashley walks out wearing, for instance.
Otherwise, it needs the girls to start realising (if applicable, I guess) that you're seeing more than one of them. Whether that's the conflict (probably) or that leads to threesomes and harem opportunities (possible and doubtful, respectively)...