Yes,I`m not sure there would even be a plot in this game without her
A series of encounters with potential romantic interests,with only thing making the game stand out being high quality renders
but
you add Quinn and you get life and colors and excitment
Can you imagine Maya path without Quinn?
She has no reason to join Hots,so she doesn`t,instead she works at a cafe for her tuition - the end.
You don`t go for the panty heist,because there`s no Quinn and no panties,you don`t impress her and Camilla with your magic johnson,there is no HOTs path at all.3/4 of those girls probably wouldnt even join the sorority.
During cumpetition some random chick sits on you and grinds and thats all.
Like it or not Quinn is central and crucial character for this game.