I like what they our doing to our main abilities damage increase in 5.3, it is much needed to keep a balanced DPS on boss fights and when all CD's are off we will still be able to do some damage instead of feeling useless. It will deffinantly help to spike my burst in pvp which will make up for the severe lack of Defensive CD's in my enhancment shamans inventory. But having a shorter CD on SS will cause Acendence to become seriously OP, as much fun as it would be, 3 Stormblasts with 75% damage increase alongside Hero and other damage CD's would probably be able to take out the whole team. Acendance is a beast Talent as it stands in 5.2, honostly i think its already OP as is and i would rather not change the stats of it, or the Cooldown.
What i feel needs to be addressed is enhancment shamans totems, they do far too little are very bulky and now cant be used when silenced. Totems are our biggest defense
so whats the point of not being able to use them when silenced, and unless your using totemic projection your always resummoning on top of an enemy player using all your GCD's on totems, just give us the talent Totemic Projection and make something new for that tier. Just having TP gives us a huge advanatage against enemies and eases the pain of managing totems (which is a big problem for enhancment, especially without add-ons) plus it just feels like a natural talent for a shaman to have.
Lastly we are a melee class, why do we only have two melee abilities??... SS and LL are the only abilities we need to be in melee range to use. Dont get me wrong both are awsome abilities, LL espiecially since its difficult to use properly. but i can't count how many times iv had a healer down to 15% with both LL and SS on CD and all i can do is auto attack and throw a cruddy Lightning Bolt... C'mon blizz give us some melee flare, maybe a LL that can Proc off Flame Shock, or a 20% execute like Mark of Death you gave rouges in 5.2, just something to keep the melee battle alive against that enemy player instead of always kiting untill you can hit them with a LL or SS