Should it be used? I've never tried it out, but I just started to PvP. I will give you the explanation given to me. Let me know if it's BS or not.

The going threads on Wowhead state that Frostbrand/Flametongue is the best route to go. Your target gets slowed so you can lava lash their face off. I also hear that it's great against plate wearers. I am uncertain of why. I hear it is a great benefit to compliment Frozen Power.

Another states to keep Windfury/FT because of the faster swings and potential death that can be dealt. I am using this for PvE and PvP. People die so I am not sure if it will even matter to change.

Thanks for the help.