I think that most of the 'Others' route girls are going to be closed off, most of them aren't even set up as proper romantic partners for MC, so it's probable that there's going to be a narrowing down of what the 'Others' route entails towards the end of this season. With one or two being given proper routes of their own. (My guess is on Quinn and Lily)
A lot of the route is just about MC getting his dick wet, while other characters like Nicole and Riona are going to lead to inevitable dead ends.
And before anyone says that I'm just picking on Riona, the bitch has literally banged almost all the guys MC knows, if you don't think that's going cause some kind of drama/shit storm then you are delusional.