I think he means if it will be completely avoidable. Looking at this next though:
What you're trying to say is that by the end of production there will be a completely non-NTR route by just staying on the base route, but right now it's not available because your focus is on the sub-routes per episode, am I correct? Clarifying this so that we can actually just put an end to these questions people can't ask properly because they're too busy whining about the NTR
Avoidable means "no NTR at all", if there's still "a little before" it's not "avoidable" it's "unavoidable", for clarification's sake. I'd love to help you, but you do have to be clear on this.
Personal opinion; just give them a 100% no-NTR base route (not even 'a little' and thus 'avoidable') by the end so they'll stop unreasonably flooding this NTR game forum and making the non-NTR people look bad... Or they can just not play.
GL fam