Portrayed by Crystal Clarke in this version, Miss Lambe's subplot is one of the reasons "Sanditon" is so tempting for others to complete... It is a credit to Clarke's performance that what could otherwise read as "Perils of Pauline"-style melodrama comes across as heart-rending.
Indiewire on Sanditon
Clarke seems to understand exactly what kind of show she’s in, pitching her character Tina’s repressed silence as a pointed contrast to the high-pitched hysteria surrounding her
The AV Club on Ordeal By Innocence