Here's some rough talent tuning feedback/comments based on simulations:

T15: Probably shooting for a goal of ~5-6% dps per talent. Lightning Shield is the massive outlier here, being worth almost 2x Hot Hand in total value. Part of that might be because of unintended(?) maelstrom return, since the talent claims 10 maelstrom returned over 10s on overcharge but the talent actually returns 10x that. Boulderfist is unlikely to ever be the preferred talent for long periods of time since its design is a bit self-contradictory (giving us more maelstrom would imply we want to hit more maelstrom spenders; however, we're getting that extra maelstrom by devoting more GCDs to our generator (= less left over to use on spenders), and on top of that, the value of the extra maelstrom generated is reduced since the talent shrinks the gap between rockbiter and our spenders by making the Rockbiter hit harder. Additionally, any possible Boulderfist build with the current design is likely to lock you into the Landslide talent.

Boulderfist: ~1.8x (total redesign of the talent is preferable to a simple number adjustment)
Hot Hand: 1.0x
Lightning Shield: ~0.55x* (overall talent value, not coefficient - so that might include figuring out exactly how much maelstrom this thing is supposed to generate since its behavior doesn't currently match the tooltip)

* Note: Lightning Shield's "overcharge" claims to proc on "attacks" (which presumably translates into "button presses"), but it doesn't trigger on Flametongue, Frostbrand, Rockbiter, or Lightning Bolt uses. Also, since Lightning Shield is by far the strongest talent in our talent tree, a nerf of this magnitude would probably allow you to ease back on the -40% damage on our spec passive.

T30: The goal for this tier is probably a bit higher than T15 at ~6-8% dps per talent. The general goal should probably be for Forceful Winds to be at the lower end of that range for single target since it has some AOE dps applications. Note that the recommendation for Landslide assumes that the bug preventing offhand stormstrikes from benefitting from the buff will be fixed.

Landslide: ~0.9x
Forceful Winds: 1.0x
Totem Mastery*: ~2.05x

* Buff Storm Totem from 5%->10%, Ember Totem from 10%->15%, and Tailwind Totem from 2%->40-50%**
** Yes, that isn't a typo. 2% multiplicative Windfury chance is worth like ~5 dps (context: proposed Storm Totem is worth ~50x that), and 40-50% more windfury procs isn't too scary since it makes up such a small percentage of the base profile's damage (~2.4%) and maelstrom generation (~11%) + the talent can't be paired with Forceful Winds since it's on the same row.

T60: The goal here is again probably in that ~5-7% dps range. Ideally Overcharge and Hailstorm would be at the higher end of that range since they're a bit less passive than Searing Assault and require some thought to maelstrom management, though right now the opposite is true. The tuning feedback provided assumes that all of the bugs surrounding Searing Assault will be fixed (not currently affected by crit, mastery, or the Enhancement Shaman -40% damage passive).

Searing Assault: ~0.9x
Hailstorm: ~2.2-2.5x*
Overcharge: ~1.25-1.33x*

* Probably best to go for the higher end of these suggestions so the talents can stand up to Totem Mastery's Lava Lash buff a bit better.

T90: We're probably looking for a much more modest 0-2% single target contribution on this row since they're AOE talents. Of the 3, Sundering is going to have the highest single target contribution since it has the lowest opportunity cost and the most targeting restrictions and thus poorer AOE scaling (a Sundering that's worth +3% single target dps might make up ~4.4% of the shaman's total output while a Fury of Air that's worth ~0-1% in single target might be worth 5-6% of the shaman's total output since it's displacing more Lava Lashes, so FoA would gain damage ~25% faster than Sundering for each additional target, ignoring the limitation of Sundering's narrow line attack).

Crashing Storm: ~1.8-2x
Fury of Air: ~1.1x
Sundering: ~1.4x

T100: Again we're probably looking at a 5-7% dps contribution for this talent tier, though as I mentioned before, I'm also concerned about the huge imbalance in the value between the fire, frost and lightning wolves on Elemental Spirits. In the sim, the wolves have a 1:3:10 relative value for frost, fire, and lightning, respectively, and that range is just absolutely massive (minor note: icy edge claims to hit for 7.5% of wolf AP in its spell data but only seems to hit for ~6.4-6.5%, but this is much less than the size of the gap between it and the other wolves). In general, I think the talent should heavily reduce the variance in output between each wolf and instead favor a variance in the feel of each wolf on the rotation.

Elemental Spirits: 1.0x*
Earthen Spike: ~1.6-1.7x (to the ability coefficient - the debuff is fine)
Ascendance: Not yet implemented in the game, so I can't give feedback

* 4.5x Icy Edge**, 1.5x Molten Weapon***, 0.5x Crackling Surge should leave the talent's output relatively unchanged, just more consistent.
** Ideally a different mechanic (one that had an impact on the rotation) would be used with a similar value to the other two wolves)
*** Ideally this would include adding -% maelstrom cost to Lava Lash on the Molten Weapon buff so that we'd be encouraged to spam Lava Lash in reaction to seeing the fire wolf summons.