I know from where you come from. I played the Son route as well, but as we saw over the last months, gundrop has enough problems getting the updates out, which impacts size and to a degree, quality.
If he focuses on one route, Dad- Daughter is more advanced so it should be this one first, he can keep the quality up. after that he can make a really good son route.
If he does that After as you suggest, then the game would be "complete" and he has to overhaul the whole game..
That's not going to happen i think.
It's very simple(for me).
He maked a huge mistake with the dual stories, it would have been better if they were seperate games.
But as with a lot of developers on Patreon.... The mouth was bigger then common sense.
The first update was awesome, i have to say that honestly...showed a lot of potential for both the F/D and M/S route.
But the creators preference ultimate got the upperhand and that showed.
I played this game for the M/S route, and because i don't like the F/D route this game is becoming a huge dissapointment for me.....BUT i can understand that for the F/D fans this is 1 of the better games out here.
BUT if he is smart he is going to add some M/S content in this update and the next, because on this forum(and others)there are a lot of Patreons who are going to cancel their pledge if that does not happen.
If he does not want to put out more M/S content and he wants to focus on F/D then he needs to be honest to the pledgers and say that this is a Father/Daughter focused game with some sequences to the son....
But this game is a good tip for al the creators out there(Including me)....That 2 stories in 1 games is just not worth it.