levelling a druid is easy enough if you have quest buddies, and personally i had an easy time because there were a bunch of us druids at the same level doing the same quests. the xp got split and it took a little longer, but we learnt how to play in a group, and early. that was invaluable, imho.
you're right though. things do pick up at 20 after kitty form. also, the versatility of the class helped me tonnes. i could stealth in and steal stuff like a rogue, switch to bear for some extra survivability, switch to caster form for some heals... having a little bit of each class in one package makes levelling easier.
you should get your druid out and play him/her more. it's rewarding! i mean... haven't you seen the awesome oomkin dance?