I have a private Feral PvP (that never been published because I was a noob and the code it ugly xD) back in Cata but I lost it in a accident Windows 8 install.
But a PvP feral druid should:
- Faerie Fire all rogue/druid around you without targeting him.
- Skull Bash every healer around without targeting him, Skull Bash is the BEST interrupt because it have 14 yard range.
- Instantly shift out of root and snare (you never lose to a mage)
- You nature's swiftness to instant cyclone interrupt caster/healer, root melee or hibernate other druid/shaman in ghost wolf form.
- Instant Wild Charge back while FLYING (I can't count how many time a shaman try to Thunder Storm me off the AB clip only to see my feral instantly Feral Charge back to him xD)
- Shift out of cat form and Reju/Lifebloom when a hunter casting scare beast on you.
- Lock down healer long enough with the new druid buff (Rip on his dps + Intant cyclone on healer + stealth back pounce (yes, 6 sec cyclone long enough for a out of combat prowl) + maim + cyclone again + disoriented roar + bash + 3rd cyclone xD) Ah, I forget druid now can pounce more with 30 sec vanish and ME shadowmeld too

- And...
PvP as feral is fun, I hope I can find time to renew my feral CR later on ^.^