Yes the ntr path has more content with the mom and sister but from a realistic point of view that should be expected. After all you don't go from wimpy beta to dominant alpha male overnight unless drugs or super powers are involved and this game has neither. Give the alpha route time in sure that the devs will try and balance both sides and even if they don't it's there game yes I will be disappointed if it turns into a primarily ntr game but that is there right it's there game after all I'm just a pervert pirate.
I do not really agree on that realistic path. I know we prefer the fantasy that we seduce the virginal, perfect mom and sis that would never think of such debauchery and enter only into such a relation due to their love for us
Truth is though that it is always circumstances and/or an emotional need on both sides that lead to incest. Now MC might need to mature a bit and have to overcome some societal taboo in himself and Mom and Sis, but he already has the relation, love and trust with them he has build over his life with them to build on.
Also a fun fact for those that think MC would need to alpha up, in reality in almost all Mom-Son incest cases it is the mother that starts it and is the one in control actually.