I'm still gonna say that, if they're dead-set on keeping Flare Star, with the reduced cd of Swiftcast, I could see an argument being made for it being a long cast of 5s with very high potency (I mean like... 900 before the AF multiplier) that you can instant-cast for 5 seconds of mobility.
It's much worse than Picto's motifs, since those can be SC'd when it's convenient, but it's probably better overall. That's one aspect of Pictomancer's design I think can be ported over to BLM.
Ofc, that's just for Flare Star. BLM has 50 problems, and I'd rather get rid of Flare Star, in honesty...