Let me credit the original idea to Anaro over on the beta forums (and his own blog, Cataclysmic Shift). He suggested that Thorns become a usable ability like Barkskin. Upon reading his suggestion, I had an epiphany: That IS a great idea for Thorns. So I got permission to flesh it out here, on my blog. Hopefully you'll leave some feedback about the thoughts and what you think Thorns should be. Here's the idea:
Thorns - 17% of base mana, Instant cast, 1 minute cooldown.
Thorns erupt from the druid, causing damage to all attackers for 10 seconds. Shares a cooldown with Barkskin.
Thorns erupt from the druid, causing damage to all attackers for 10 seconds. Shares a cooldown with Barkskin.
Ok, so that's the base ability. It would give the resto druid some added danger. The bear druid would get another cooldown that they could trigger if Barkskin was not needed. For the raiding cat and the raiding Moonkin, this would offer very little. Since our goal here is raiding utility, let's introduce another talent. This talent would fundamentally alter the ability, which I think could be considered and "interesting" challenge.
Empowered Thorns - Channels the power of your Thorny aura, causing a 5/10/15% increase in spell damage for the duration of the aura.
This is the caster version, planted down pretty far in the Balance tree to make it unique to Balance druids. A similar version could be used for cats but, honestly, they don't need more crap! Some napkin math says that this would be approximately a 2.5% increase in DPS if used on cooldown (assuming a constant DPS). It could have interesting implications with Eclipse, Starsurge, and DoTs, as far as when to cast, etc. I think this is on par with the kind of increases we are looking for from talents. It sure beats Genesis and Owlkin Frenzy, that's for sure!