Are there any rough ideas for how much further Elisabeth's questline will go for? Since it is roughly an academic year that is the planned playable time iirc, would Elisabeth's, or any other of the potential character's have their relationship build-up draw across until the near-end? The halfway mark?
Generally, how long do you think the average candidate to date would have their interactions drawn for before they date the Main Character? (And when/if such does occur, how much further would their interactions go?)
All storylines will have slightly different length. But if you "speedrun" the plotlines, most of them will come at around 3 months. Some of the plotlines are dependent on the "seasonal" events though, so depending on when an how the storyline progressed, that can stretch the plotlines somewhat, while you are waiting for the next opportune moment.
As for the "post-dating" content. I am planning on having one or two normal post dating events, and a couple of minor events to boot.