You nicely described the reasons why she has a low value from the story standpoint. I'm afraid that Philly wants to give her too much screen time given her weight in the story. It starts to look like if she takes away other characters' time.
IMHO, I would easily trade the excessive screen time of this very secondary character for extra episodes with the story-driving characters like Shanlon, Meredith and Victoria (damn, even with Betty) who are not on Jake's side (M and V) or not in hiding with him (S), so we can't see them often for obvious reasons. Just some more sequences fueled with meaningful dialogues and interactions would be enough to me - I don't demand lewd scenes for the sake of lewd scenes.
Unfortunately, characters that are not close allies or associates of a protagonist frequently stay underused in VNs, even in mainstream games this is not uncommon. To me it's a pity to watch crucial or remarkable characters go unexplored and underused throughout a story, because a dev wants to satisfy his audience's whim to see a more varied cast for lewd scenes and pays too much attention to questionable low value characters at the expense of more important ones. That's why Shanlon and Meredith say hello to Dragon and Lynn from Depraved Awakening