The thing is that the most imba thing in WPVP is invisibility>stunlock, and as Druid you have that like a rogue does, even if not as strong. It actually doesn't matter THAT much that it's not that strong because if you get it right you autowin, and that's the main imbalance in WPVP, invisible stunlock attacks are just too strong (just wait for him to attack some monsters and be at 50% health.... there is nearly nothing he can do except hope you are not around anymore if he was lucky enough to have seen you before you turned invisible). I think it is stronger than Warlock in the end because Warlock can't force a fight/kill on you, it's just that you got to stay away from him. He can't really assassinate as much, but if he's attacked he win. On the other hand rogue/druid assassin is just killer. It is imba.
But it's not like all fights are like this because it is quite lame to attack this way, and you don't have to attack this way to be strong as druid in WPVP. You can do so many things, make use of all your spells, and really confuse your opponent as to which approach you are actually taking against him because are you trying to nuke him with some spell? Are you trying to damage him with cat or tank things with bear or bash? Are you trying to run away or just get a heal and come back? I have found that against all classes you can make use of almost everything you have in your arsenal, though it depends a bit on talents of course.
The strongest style is probably to go heavy feral, but there are many possibilities and your heals are ALWAYS important, and your spells are also very good to use. You can even use Soothe Animal to your advantage
It lasts 15 seconds and reduces range of attack to you by 10yards, just sit in those 10yards and the monster will attack your opponent if he comes in melee range of you Basically your only problematic ennemy is Warlock but I guess that ends after you get a out-of-Fear-Trinket. Even then Warlocks are killable, they are not invincible, but hard to kill. You better start a fight in an advantageous situation but that is not a problem for Druid in WPVP because of all the environmental utility you have + invisibility.
For other classes fights are always different and you are not weak, it is fun :]
the easiest class to kill I think is Mage, they can't really frost or polymorph you, you can cat vs them, you can stun them, you can rival against them with spells and you can also heal, I think it is hard for them vs Druid
But it's cool that some classes have some form of advantage I think, as long as it's possible to overcome and not always the same. Like, Warlock's Fear tbh I don't like it cause of course it can't be fun not to be able to play for 10 sec twice in a fight and that determining the outcome as well.. But since there is that trinket later, it's ok cause warlocks are not everywhere, you can invisible or run away, and then when you have the trinket I guess they feel pain again.. I think the game would definitely be better without this ability, giving warlock something else instead that's fun and not used always the same at the same time and just denying the opponent's any control while you can still damage him, it's almost the worst spell to put in a game lawl... it's so random too, you run everywhere, maybe you are very far in the end maybe not at all, maybe you pulled 5 monsters maybe 1 maybe zero, it's a bit stupid. I wish this was removed and stunlock toned down a lot^^
And yesterday two mages 5 levels below me killed me cause they kept ice bolting me and I just ran but shapeshifting out of frost so many times I went oom and they finished me xD So with a little help or time Mage can win vs Druid. I think if you play Mage vs Druid you should try to make druid go OOM before really attacking him... but not sure about cooldowns of CC abilities of Mage.
