That's a pretty nice comparison of meta there. Still, there are a few more things to consider at level 85.

First, your rating requirements are 4 times as high for the same effect while your spell power and base healing combined roughly doubles. That means that the values of ratings are roughly halved compared to intellect. Judging spirit is a bit harder. You now have ~32k mana, this will go up to 90k+ in the first tier of raid gear. As regen is const*SPI*root(INT), this means that in order to retain the regen:mana ration (i.e. the time to regen to full, or regen a fixed percentage of mana) when your total mana triples, your SPI has to scale as much as root(INT), i.e. by root(3) = 1.7. So, while crit/haste/mastery need to be 4 times as high for the same effect as now, spirit only needs to increase to be 1.7 times as high. (So far, the level-dependent mana regen constant has not changed from 80-85, this may still happen though).

Now, back to the meta gems. Insightful offers 75mp5 when spammign heals. Ember adds 33 INT (54-21) and 2% max. mana. That's 600+1800 mana, or 40 mp5 from initial mana and another 12 mp5 from Replenishment. Also, assuming that you reach 90k mana and your spirit doubles, you'll have at least 600 mp5 in combat, the 2.4k mana add 8 mp5 for Ember (x% increase to mana means (x/2)% increase to regen, for small x), 10% with Mana Tide Totem on cooldown.. The 33 INT also add about 0.5% throughput, and it boils down to whether this 0.5% throughput from Ember is better or worse than the remaining 13mp5 advantage from Insightful which require casting every 2 seconds like clockwork. Since Ember scales with max mana and spirit while Insightful may at most scale with hast, Ember will be the better choice. Maybe not necessarily in blues but between T11 and T12. But before that, the old Insightful meta is still at least very competitive for long-term mana.
Revitalising is a adifferent beast. 54 spirit adds about 35 mp5. Assuming 20% crit (15% base/int/crit, 5% raid buff), the 3% healing adds ~1% throughput. Compared to the others, it doesn't look that good. You'd have to value throughput much higher than mana to take over the other meta. And the 54 spirit part then is not very appealing for focusing on throughput. If it were "54 SPI + 2% mana" vs. "54 INT + 3% crit heal", it would separate them more. Then again, Revitalising scales directly with crit, so who know how it'll turn out finally?

Acuity -- 3% crit.
Convection -- 10% less mana per lightning bolt = more mana gain per cast.
Elemental Precision -- Hit and 3% damage.

If you are going to go for a build that uses Telluric Currents for mana regen than none of these talents are wasted.

I would be shocked if a resto shaman can't push a 3.5k lightning bolt at 85 - the level necessary to make a lightning bolt a net mana gain. But that isn't the point, and I don't imagine that was the thrust of GC's comment either. It won't be an effective way to regenerate mana for a healer, emphasis effective.

After watching videos of beta raid testing, it seems highly unlikely that you will consistently have a safe 2ish seconds to toss a LB at the boss. If you rely on this as a restoration mechanism, I sumbit that it will degrade your effectiveness as a healer. You will hesitate to interrupt nearly-complete LBs to address a healing issue. That hesitation will, in aggregate, mean more wipes, and they'll be your fault. It's the kind of intangible complexity that doesn't show up in a model, or a parse, or a spreadsheet, but is clearly there. As long as even some of those 6 talent points can be spent on other talents that enhance your traditional healing objectives of regen and throughput, I don't see how adding this kind of calculus to your brain's cycle load is a wise decision.

Locking this thread. All future resto shaman discussion should take place in the new Cataclysm discussion thread. With the launching of the new threads, rules will be aggressively enforced as per this announcement:

http://elitistjerks.com/f79/a59-cataclysm_coming/