It seems like the general opinion now is that BLM is garbage for Feast and SMN still has a major flow in that it has no defensive skill whatsoever.
A question for SE; what did you think would happen when you nerf to the ground the CC tools of a caster who has long cast times? You didn't even bother giving them something else to compensate, and you did the exact same thing with SMN.
I don't really know what should be done for BLM, perhaps reducing the cooldown for Nightwing, for a start.
For SMN please do something about that decorative skill that is Misty Veil, either reduce the cooldown to 1 min to make it anywhere near useful or make it a defensive skill of some sort, a SMN who gets focused a lot is a paper target, and their defensive CC isn't really helping.