About Flametongue Totem
The nerf was necessary. Not only because of Wild Even Shaman, BUT because Flametongue-Totem always was a big issue: see Old Gods Expansion where Aggro-Shaman took the reigns over. Flametongue was mostly the fault of it. Since then. Blizzard can't create strong 1-2 drops for shaman, since Flametongue-totem buffs them and make them able to destroy minions that cost 1-2 mana more.
It was far too strong for 2 mana.