LOL that vid @OP. Almost died laughing.

Anyone and their dog's grandma can see that FL is a broken SMN mess atm. Why would anyone argue against that?
As I understand it, SE has acknowledged that FL is not balanced atm. From experience, this doesn't actually mean much; they haven't really balanced things around PvP with FL primarily in mind since, I dunno, Secure? Slaughter?
How to fix things is up to SE, but diminishing returns on CC, some sort of damage control on AOE (get a bahamut buff or similar when hit).
The damage reduction is already in place for melee clases, but against the massive AOE bursts it means nothing.
And, no, you can't be prepared for it all the time. The LBs activates too fast. Of course, you can play smart and all, but it really boils down to being overly cautious more often than not. Which is boring.