A heads up, found some J availability in the 6:30 am Bos-Lax 3 class in early September for 25k miles (should be 32.5k if they meant to release them at all).
if anyone finds J or F saver Lax-Jfk or LAX -Bos, please send me a PM. They used to have a couple of flights with saver award lax-JFK RT released for summer 2019 but that practice seems to have ended.