You are right that it will take more time, then again it also makes the game more fun for her to make and will, if I can believe Notty and why should I not, provide more storylines in the later chapters that will branch more. Well her having fun while making the game is the best guarantee that she will keep working on it, so even if means I will need to have more patience that is overall a plus.
Also having those different reactions from the rest of the cast to the different MC's provides you with quite a bit of extra information you might well need to play those paths you would like, since this is a game where NPC's react according to their believes and interests and are fully consistent characters over all paths and branches.