I cant agree with that because looking at stats the deck has about 10% more winrate than the second best deck witch in scale of thousands of games is really a big deal and deck dont really have a bad mechup so its clearly a problem and blizz did not thought that out

Well lets see just how much galakrond invoke cards are unfair. Shaman have without a doubt the best tempo hp.
Warrior
3 mana 1 dmg aoe with 3 att on hero (3 mana swipe with the downside of tanking w ur face not bad)
Rogue 3 mana 3dmg backstab (3 mana is worth 5dmg backstab like shadowstrike only upside is geting a lackey witch gives 0 temo rightaway)
Warlock 3 mana build ur own rager w 2 1/1 not bad but easily cleared and dont affect board right away
Priest (let me point out that in my opinion worst hp too much rng and not all priest minions are that good) 1/2 1 mana invoke really good card but like i said hp just gives 0 absolutely 0 tempo and not that much value 5 mana spell is cool and all but priest control all to well already.
Meanwhile shaman invocation of frost essentialy glacial shard w rush ultra tempo card whats next oh yes 5 mana 3/3 w 2 2/1 rush we could compare it to the giggling inventor witch was 2/1 so already a lot worse and gave 2 1/2 divine shield tount that slightly different cuz its deffencive but about the same power lvl however our 3/3 also pushes our galakrond 2 stages witch is super value (giggling inventor 7 mana now btw so nerf that shit hard)
So in conclusion shaman got cards on whole another lvl and everyone shittalking about dust shut just stuff themselves w that cards and take the lesson of patiente and next time look at the win rates.