Originally posted by UCanShootMyNovaIt doesn't.
Tearing apart a skyscraper sized object, being able to completely bypass Senya's Force defenses with the disparity in power between them and slaughtering dozens of Knights and bringing down ships by unknown means along with what should logically be a substantial power growth up to KOTET should put unchained Vaylin at least approaching Revan's level.
If you had brought up Vaylin one-shotting Arcann and Senya, thats a feat worth mentioning, though Revan could also probably do so.