I agree with you that JA is gently mocking traditional romantic notions a bit. I think JA gave Anne the flaw of an overly romantic character, and gently mocks it occasionally in the novel.

In Chapter 21:
to avoid Mr. Elliot was almost a first object.
...How she might have felt had there been no Captain Wentworth in the case, was not worth enquiry; for there was a Captain Wentworth; and be the conclusion of the present suspense good or bad, her affection would be his for ever. Their union, she believed, could not divide her more from other men than their final separation.

Very flowerly language. But JA immediately follows it with:
Prettier musings of high-wrought love and eternal constancy could never have passed along the streets of Bath than Anne was sporting with from Camden Place to Westgate Buildings. It was almost enough to spread purification and perfume all the way.

This passage always makes me smile. It stops Persuasion from being sickly-sweet. Anne has stayed single for 8 years, but it's implied at the first that a second attachment would be the most natural cure (from Chapter 4: No second attachment, the only thoroughly natural, happy, and sufficient cure, ...

Anne gets poetically despondent about autumn and lost loves, JA introduces the farmer meaning to have spring again. Anne moralises to Captain Benwick, and then shortly reflects that that, like many other great moralists and preachers, she had been eloquent on a point in which her own conduct would ill bear examination.