Nontheless that doesn't seem like something that would preclude characters like Bez in a completely different area from both of Yakuu/Diula in particular from getting new content, or even Pyeka, who in a way with her potential future plot will diverge from Homaspernia could very easily have content (akin to what I mentally drool over, her being assigned to "punish" an unruly village ).There vital in building their respective paths/relationships…not every update is gonna be filled with main plot points in general for their routes… the updates in general build up the paths till they reach to those main updates (events)… that Bezvy choice builds the path your heading in with her… her stuff isn’t as black and white as it seems… same goes with Diula…
Such content could also set the tone as you mention for them as well without breaking any sort of continuity with the others. MC going with them specifically for some content related to their route need not conflict/converge with the others to be good. Especially given they DO have a rough outline of most of the plots it seems at this point?
Not trying to argue, as I generally agree with what you're saying. Just a bit of a letdown to see two of the middling/upper most liked characters over the course of the game's development being put by the wayside, and it'd be months of being in the queue to drop the $100+ I figure anyhow even if I threw in on it.
(Truthfully, I'd rather back several projects for half a year or longer with that benjie than that, despite how I gripe about the lack of content in favored characters ).