In general, I try to understand games - sandbox-ish games even more so than "pure" VNs - from the view of the finished game, not in terms of individual updates. The latter can be misleading sometimes. E. g. if Yona now gets four content updates in a row that would seem strange to us who "consume" the game incrementally, but may make up for the lack of updates earlier and the discrepancies may not even be noticeable in a finished game anymore.
And as for sex, as others said, there is plenty in the game, just that we've seen it all already. But games can be ruined in my opinion by too many sex scenes without any standout content, just like in a game which had the main idea of dating your daughter at one point the whole fucking your daughter got in the way of the story finally finishing up.