Mate Warlock wont be played ? its like top tier pvp class
I think druid is not a smart choice unless you want to heal ... P.S in vanila they dont have res so in 5 man without a hybrid class to rez people you will suffer from corpse runs.
Druid will always be a healer at the end if he wants to go end game.
Cant really tank raids because of the lack of gear and boomkin .. well not enough mana in the world.
Maybe feral will be seen in pvp but not in raids.
being unique in vanila wow isn't a good thing in most of the cases its a very conservative game style in vanila.