Although this talent makes you hit really hard with wrath I can't figure out a way to use it in PVP as Feral. As most have said, you won't be wrath spamming for 45 secs. Also a half-minded player will probably try to interrupt and, as feral don't really stack haste, your casts are so slow that even without interrupts it's not much of a big burst.
I prefer Nature's Vigil for PVP. The part about aoe healing on damage is the only thing i don't manage to use a lot. I just pop it as another damage bursting cd with incarnation + TF + Berserk and ravage spam. That's actually a nice burst, you can instant heal yourself for more damage, and if your partner is nearby he will get healed.