Like I said in above post, they'll absolutely have to nerf the CC, or it will be very OP. Broketastic, in fact.
If they nerf the CC to where it should be, a functional keystone of how BLM functions is gone.
BLM will not be able to rely on tanks to keep agro off of them in PvP, and they'll be a huge drain on healer resources; resources that would be poorly spent keeping a BLM up when bards, monks, dragoons, marauders and DoT classes are obviously superior DPS allies to keep healed.
BLM will not be able to do much of anything IF CC IS NERFED TO WHERE IT SHOULD BE IN PVP, because the class design made BLM so heavily dependent on being able to hold still for pretty much ever. This is viable in PvE where you can lock down enemies yourself while soloing or stand way dafuq off where you belong while the tank's keeping the mobs' attention where it should be.
PvP doesn't work like that. In a WoW-clone game, it will NEVER work like that. Ever. ...Ever.
And unless something far more compelling than 'There will be PvP exclusive actions!!!111!1!!!1!!one' comes around to be seen on the matter, there's no reason what so ever to assume that CC won't be nerfed into the floor where it'll need to be for PvP to be viable at all and not CC-is-god festival.
Thus, there is no reason to believe that BLM is going to be worth a hill of beans in PvP. If they're very foolish, they won't nerf CC for PvP...at least until virtually everyone is bawling about how nobody can kill the all BLM teams and the sleeplock is never-ending, inescapable and unavoidable.
Think about it.