So the 6.4 PvP FL changes....

[Rexxus]

Will these changes affect the current FL meta?

You will probably see more SCH being played and topping the damage dealt category (still with 0 kills, but eh - when you can do 4m+ damage in a match, who cares about KB's right?).

You're going to want at least 1 BRD in each party to reduce that LB timer, if you didn't have one already
EDIT:(I'd like to make it a point that if you are on DRG/SAM/DNC/WHM - you will probably barely notice any change to your limit breaks being 'nerfed' - since your bards will be using their LB charge more often to compensate. And if nothing else, this change will also act as a Buff to all other jobs' LB charge times as well.

DRK Salted still going to be problematic, even if you nerfed their damage by 50%. Which they didn't. But hey, at least the BH5 kill squads will win a little bit faster in Seal Rock and Onsal now - so that's something at least.