Innervate!! Horray.

Q u o t e:
Pros:
Innervating Paladins and shamans is now worth the global cooldown.
A moonkin innervating himself is now worth the global cooldown.
In PvP, a druid can return a lot of mana to themselves (might allow ferals to go crazy shifting for 20 seconds).
Makes MP5 gear very good for restos (more gear selection in theory) in cases where spirit is hard to get (lol ... which certainly isn't ulduar).

Cons:
Makes spirit even MORE useless to every druid except resto.
Stealing it will fill a mage's mana bar.
Won't scale with level 80 content. (they could have gone with 300% of your base mana and X% of your spirit+intellect over 20 seconds

We agree with Kugrette's summary.

Spirit isn't an attractive enough stat for Balance druids. That's a problem, but Innervate is not a great solution to that problem. As I said in a previous post, it's more like int and crit become great regen stats for Balance, which then leaves spirit to become a damage stat... which you have to admit is a little weird. (That said, we may still boost it for Balance in the near term.)

Innervate is a situational spell, one that you use once or twice an encounter at most and often times not even on you. Do you (or do you even want to) really stack Spirit just for that? Spirit is not something PvP druids have in abundance, so we didn't think it made a lot of sense for PvE druids to just be that much better at Innervating. We also don't think Innervate needs to scale super well (at max level). Your spells are already going to hit for more (or heal for more) and your mana pool is going to be bigger. Being able to also fill that pool every 6 minutes more optimally as you increase in gear doesn't feel like a big deal. Is 15K mana awesome at level 80 in blues? Yes. It is somehow less awesome at level 80 in Ulduar hard mode gear? Just slightly.

Q u o t e:
Ok, how about this:

Experienced balance druids that know what the hell they are talking about know this isn't a nerf.

HOWEVER...

This only increases the need to re-evaluate the secondary effects of spirit for balance druids, as in more crit and/or spellpower.

This is a nerf to the usefulness of spirit for balance druids, wrapped in a welcome buff. The buff is appreciated, and was needed, but now its time to re-evaluate spirit for balance druids, or re-evaluate how much spirit needs to be on our tier set.

Well said. Making Innervate based on Spirit is not a great way to make Spirit an attractive stat.

Making Improved Moonkin Form grant 30% Spirit to spellpower instead of 15% is the kind of thing that would make Spirit a more attractive stat.

It is important to the game that some things scale with gear. We're not convinced Innervate needs to be one of them. It will scale with level since your base mana changes when you level. (Not that anyone needs to be worried about that for the next few patches.)