Anvilicious: It's ridiculously preachy, sentimental, and all the characters are one-dimensional, the message of "Don't just run off with a hot guy who looks good in a uniform" was an exception to the norm - as Lydia Bennet (or at least, her sisters) could attest.
Catharsis Factor: La Rue was the one directly responsible for enabling Charlotte's elopement, only to abandon her when her former student was penniless, ill, and pregnant. The servants see her turning out Charlotte, give her a Death Glare behind her back, and start spreading gossip about La Rue's poor conduct. A few years later, La Rue reveals her husband divorced her and left her penniless, so she ended up back in England begging for a few coins a day. Though the Temples decide to forgive her and pay for her medical care, it's only so she can die in peace and not because they actually like her.
Values Dissonance: Charlotte is repeatedly shamed by the world for running off with a guy she just met, and the narrative considers it a "happy" ending that at least her parents found her just as she gave birth and is dying. These days, readers would note that Charlotte was groomed by an adult that she trusted, and used by a man older than her that saw her as eye candy. Her father would easily be able to press charges against her so-called husband for statutory rape and kidnapping.
