This is updated with mostly-confirmed Symbiosis info, should be final before long: Mists of Pandaria: Class and Specialization Overview - Wowhead

Mirror Images are actually hitting for 140-150 dmg, making them only a threat drop and a disorienting ability for PvP.

Re: Heart of the Wild

Just a thought; What's stopping us from using HotW to move our Eclipse bar to the spot we want pre-pull with healing spells?

I hope there's something I'm missing, I really don't want to be doing this every progression pull.

Interesting thought, it wouldn't work with some quick wiping though as the cooldown is a whooping 6 minutes. But i think that's the first positive dps aspect i've seen of the level 90 talents though!

Even less brain needed to play the spec then, the current rotation feels so easy and spamming only moonfire/sunfire during movement will make it even more dull to play.

Anyway, spent some time on the beta today for the first time in a while and, as expected, they fixed the starsurge bug where you could cast it as the last spell before eclipse and get its damaged boosted by said eclipse. So it is no longer optimal to use starsurge as the last spell before an eclipse, even more subtleties being removed from the specilization (although this was a bit of a no-brainer).

I've already expressed my displeasure about where the moonkin rotation is heading, currently it feels as if blizzard wants moonkins to be one of the easiest specs in the game to play, 4 spells + 2/3 CDs while standing still and they're all used in a very set pattern, one spell while moving. The only thing that seems to be a player's choice is how you want to aoe; multidot, hurricane/astral storm and shrooms (as starfall is a no-brainer).

Hopefully they will make Incarnation good enough to add some complexity to the rotation, as the only things (that I can currently see) that require some skill/knowledge are to use instant cast starsurges with the last spell of an eclipse (as it still seem to work) and maybe CD management of Celestial Alignment.

I've been through symbiosis a few times, and I know it's early but it seems like a negative for Bears. Every tanking spec receives a cooldown from it, but the only time a Bear receives a cooldown is when it's cast on a death knight. It seems unbalancing in the same way that trading healing cooldowns or dps cooldowns would be.

Feint and Spell reflection could be somewhat useful to though.
Fear Ward could also have it uses i guess, but that is highly situational.

Patch going up now, here's a preliminary diff of changes: Mists of Pandaria - Build 15640 - New Items, Abilities, and More - Wowhead News

Only meaningful ones I see for Balance are FoN changes to 1m cooldown (not 1m duration, makes more sense), and Moonfire down to 12 duration. Don't see anything for Resto at a quick glance.

I don't understand the Moonfire change? They said they plan for Moonkins to still have 2 dots, yet this will really hurt our uptime of both Moonfire/Sunfire on the same target. Makes no sense.

It will hurt our DoT uptime, but I see it as a positive change, honestly. Right now, Moonfire/Sunfire is the tool that Blizzard uses to balance us. It is our strongest spell by far. I'm sure there are scenarios in which Blizzard wants to prevent, say, popping CA, double-dotting everything in the room, and sitting back to own the DPS meters. (Yes, I just made up a scenario, but it's meant to convey the ease and power of multi-dotting for a Moonkin.) By reducing our reliance on Moonfire to carry our DPS, then it gives Blizzard more knobs to turn to balance us, hopefully avoiding the situation where we start out ridiculously strong and wind up on the bench when Heroic Spine comes up. Not to mention the PvP implications, which I'm sure someone who is a better PvPer than I can explain.

Edit: Playing around with the change in Rawr, and it changes the balance of our L75 talent choices, naturally. The Force of Nature change may have been a little too much, as it comes out on top handily in level 85 BIS gear. Incarnation weighs in just behind, with Soul of the Forest bringing up the rear. They're all very close to each other; I would certainly say that one could choose any of them, depending on the situation, without having to feel too bad about failing to min/max. Although Rawr has not yet shifted to level 90 stats or gear yet, so I'll defer to WrathCalcs on that score.

Edit 2: If MMO-C's description of Force of Nature having 15-sec duration/60-sec cooldown is correct, it's still seeming to be kind of anemic.

MMO-Champion has more changes, mostly a numbers pass, but one notable item: Wrath has been reduced back to a 1.5 second base cast time. This hurts the value of haste, since we're back to hammering the global cooldown once our haste level gets high enough, especially in conjunction with Nature's Grace.