Yeah that's the problem I guess. It would be too much for one person to make something like that.I can see your point in there and I can agree that this could be a great possibility for Lins story and the elfs in general.
Yet I do believe that Runey would let us choose if we want a child with Lin or not, so he would need to write to different story that would make sense and yet would tell the necessary things on both paths.
Also I think, that Lins baby would need a lot of additional render for the immersion of it. Some encounter with the rest of the resident and their reaction, in particular Jin, Ashley and allv the other elfs.
Some bonding time with Lin and the child, as well as MC, Lin and the child. Supposed bonding time with the child and the some of the other resident as well.
Means a lot of work (story and renders) to do and this for one optinal path. It would also mean that if this is completly optional, the Lin "child path" and the Lin "none child path" would be very unbalance in regard to content.
And to have Lin pregnant without all the scene for more immersion, would be something I wouldn't want to see in this game, where the immersion and the story is one of the biggest feature that separate this game from many others.
I mean it could be done that the gov or the elfes take the child away and that might result into so much drama on top of everything. Ah man really sad this is just too much.