i kinda agree with minipon. in part
Vicky's Route was a solid "B", simple and basic, but has little character development, is very flat, i think that is too simple, too short in story and sex scenes, that is why only gets a "B".
Suni's Route is another solid "B+" ( it was an "A", but the new routes are getting better and better, also bigger, and this become a B+), still, keeping the basic "Dating" but giving the character developing and a deeper personality to the character, with more story and sex scenes, also a little extra in the form of Shauna, is almost an "A".
Rye's Route was a solid "S" still uses the "Dating" plot during the first half and later adds a little plot, but is a plot that focus on the character, in developing the character and the relationship, great sex scenes, great character, great story that gives the focus to the relationship, that is why get an "S".
Demetria's Route is a "B+" it has good dating and has some character development, the plot is simple and still focuses on the character, but the ending is very boring, i have hope that the mixed Ending with Claudia could give Demetria's Route a better ending, and move the route to "A".
Claudia's Route is a "C" is the weakest route for me, the route put the character on the side and focuses too much in the elaborate plot, there basically no dating, almost no development on the character or relationship, you spend too much time working the "Conspiracy" and almost no time dating the character, what is odd, because Claudia was hyped to be the MC childhood friend, but that is basically never worked in the route, the route focus more in the conspiracy plot and lost time with side characters. so is a "C".
Mallory's Route is a "B+" maybe a "A" in some points, it has the dating and has an elaborate plot, but the plot still focuses in Mallory, has good sex scenes, and the development of character and relationship so is a "B+/A".
Wallis's Route, well part 1 is a solid "S" has lots of dating, lots of character development, good sex scenes, it focuses on the characters and relationship and end with the twist that hint to a bigger plot and more development, so in a way is very similar to Rye's Route, if the route doesn't lose focus and get lost in an over elaborated plot that put the character on the side for the plot, will be another solid "S" there no problem in a bigger plot, if the route keep the main focus in the Characters and the relationship interactions and developing, also sex scenes, is a very balanced route, with an interesting theme. ( love the "Smoke Break" interaction)
as a whole, the game is a solid "S" love how the world and character cast are growing, love the side events, i have only positive things to said.