Originally Posted by
tetrisGOAT
To reiterate. You do not play a spec in vanilla, you play a class. The class had a more defined role, regardless of spec. The specs are there for several different purposes. Some classes are more intended for support and healing, like Druid. As such, you are perfectly capable healing dungeons as other specs. As balance, you were still intended to melee. Spells were a help, and the spec a help to emphasise those few spells that you did end up casting.
Shockadin IS viable in vanilla, but it starts at 60 with gearing options. It is a good pvp spec with ZG trinket for instance.
Everything is playable in vanilla, with caveats. One of the biggest is other players' perception. So if you are fine with still popping into cat or bear as balance, it is a good leveling spec.
What is not good, is chain-gunning Wrath. So I will slightly revise my earlier comment about being a gimped Mage, by my expectation of what you thought a Balance Druid would play like.
Druids are good and efficient levellers in general. Spec this way or not. Playstyle, however, will not be to chain-gun.