Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
FeedbackArea: what it touches
In DevelopmentKind: in v2.1.248,
In DevelopmentSection of the release
The vocabulary exists with no interactive surface.
What
A new set of sentiment values appears: frustrated, dissatisfied, likely_satisfied, satisfied, happy, unsure. It reads as a rating field on feedback or telemetry rather than anything you interact with directly.
Evidence
"likely_satisfied"
Strings lifted out of the shipped bundle, so the claim above can be checked against them.