Greetings. Long story short - elemental tree and spells are stale and needs an overhaul.
1. Lack of DOTs.
Flame shock is the shaman's only dot and it's damage is pretty low. With the re-introduction of movement-heavy fight in cata as soon as you have to move - your dps drops drastically.
Not to invent a bicycle - tier 8&9 had some dots from bolts and LVB:
http://www.wowhead.com/spell=67228
http://www.wowhead.com/spell=64928
Suggestions: 1 - increase flame shock dot damage. 2 - add dots from tier 8&9 deep in the talent tree so it's only available for the elemental shamans.
2. Unleash Elements
Let's be honest - nobody uses it in the cycle. the GCD is just too much of a dps waste. The damage is also ridiculously low.
Suggestion: 1 - increase the damage and remove the GCD
3. Earthquake
It's not worth a point spend and wtf is an AOE as last talent in a tree.
Suggestion: 1 - Make Earthquake a baseline elemental spell (given upon choosing a tree), but remove the knock back effect. 2 - Add a talent similar to the mage's improved blizzard to add 10% chance knock back and a 100% chance of earth bind all targets.
4. New bolt
All dps casters have 2-3 magic schools to choose from if one of them is locked. Shamans don't. If nature is locked and LVB is on CD - your only option is frostshock if the shocks aren't on cooldown.
Suggestion: Add a "Stormfire bolt" kind of spell that will replace Lightning bolt for elemental shamans that will combine fire and nature damage (like mage's frostfire) and will work if nature is locked. This might be the final elemental talent instead of current earthquake.
5. New "wind shield" spell.
SWG-type of ability for a 1 spell like molten shield and scorch for mages.
When used allows casting of bolt spell. But spells cost more mana. in addition rolling thunder does not work so mana is spent quicker. Used when movement is needed. When movement stops - lightning shield and back to normal cycle
As a result we will have:
1. LB replaced with Stormfire bolt. SFB crits leave a dot dealing x% of SFB damage over x seconds
2. LVB leaves a dot "Your Lava Burst spell causes your target to burn for an additional 10% of your spell's damage over 6 sec."
3. Earthquake is a baseline spell. If talented - knocks back and snares
4. FS dot damage is increased
5. UE doe not consume a GCD and hits more.
6. Movement damage from some sort of "wind shield" spell. More mana for casts. 1 type of spell permitted.
Constructed critisism and suggestions appreciated