Moonfire

This says it all..

With that graphic change, they should change the name of the spell. That's-no-moon-it's-a-space-stationfire. Much better, imo. :-D Go ahead, down rank me.

Talents which can affect the damage of this spell (directly, not counting improvements to spell power, e.g. Lunar Guidance):
Genesis - dot portion of damage increased by 5% :: 5 points (very marginal, most balance druids will skip this talent as it is very underbudgeted for damage)
Improved Moonfire - 10% increased critical strike chance :: 2 points
Nature's Splendor - 3 second increase of dot portion :: 1 point (not counting prerequisite
Vengeance - crits cause 200% base instead of 150% base damage :: 5 points
Moonfury - flat 10% damage increase :: 3 points
Moonkin Aura - 5% increased chance to crit :: 1 point
Earth and Moon - Flat 13% increase damage :: 3 points (although 2 may be passable).

The question: to glyph or not to glyph?
Glyph of Moonfire

Increases the periodic damage of your Moonfire ability by 75%, but initial damage is decreased by 90%.

Base damage calculations:
441 average initial damage - 36%
800 dot damage ---------------- 64%
1241 total average damage

However, the initial damage can cause a critical strike for double damage (talented). Additionally, the Nature's Splendor talent adds 3 seconds, which is 1 tick, an additional 200 damage.

Adjusted damage calculations (assume 25% crit)
441 * 1.25 = 551 initial - 36%
1000 dot damage ------- 64%
1551 total average damage
Unchanged. More critical strike will tip the scales toward the initial damage.

Applying the glyph, the damage calculations are as follows:
55.1 inital damage
1750 dot damage
1800 average damage, a 16% increase.
Considering that the dot portion already receives a higher % of the spell damage, a druid would have to approach very near a 100% critical strike chance to make this glyph anything but a solid dps increase.

This lends strong credibility to a different playstyle. That is, glyphing for Moonfire and Starfire and attempting to keep the moonfire dot up as much as possible. The major problem with this is the Eclipse talent, which I believe has been theory crafted to be a non-trivial damage increase, even if lost casts and latency are taken into account.

If the goal of the druid becomes to spend as much time on starfire and 100% moonfire uptime (i.e. using both glyphs), then said druid can essentially ignore the Eclipse talent. This opens up the following spec: 55/0/16.

I believe that the combination of Eclipse, Nature's Grace, and innate high Druid crit chance will make the power of Moonfire -> Eclipse (wrath, granting 30% starfire crit) -> Nature's Grace'd starfires too good to ignore.

I would love to hear counter-arguments.