The Shaman is too weak!

Oh boy, this will be fun to pick apart.

Shaman's primary issue is that, as a Mass Crowd Control class, it falls flat against single-target enemies. This is not a fundamental flaw of the class, but rather a strength of it, since it makes dealing with bosses that spawn a lot of minions (or when you have to deal with a large amount of enemies, such as raids) much easier if you know what you're doing. For example, I could use Aura and Uproot to mop up a whole bunch of mobs, then either keep using Aura or attack continuously to deal damage to all scooped up enemies. The issue is the "scooping up" that causes the class to fall flat, because of the CCI. The CCI problem has been sort of rectified with a rework to CCI, but it still leaves Shaman weak against enemies that it cannot CC. This is amended by Shaman having the highest AoE damage of any class in the game, full stop, with the drawback of requiring an active Totem in order to do it, which is an acceptable drawback for a very powerful class. Now, let's get to picking your suggestion apart:

• Sorcery's Totem interaction was rightfully nerfed, because it would effectively allow you and your friends to be immortal. Reintroducing it is a bad idea for the game's balance.
• Hadal doesn't need a Major ID moreso than an actual rework, though as is I'd say the most recent buff to its base damage puts it in a better position.
• Crowd Control already exists in this game, the previous implementation of CCI didn't tell you which mob was immune to what, and now that everyone knows what is immune to which form of CC, it doesn't need further changes. Well, except making some of Shaman's spells either work around or pierce CCI. Which you should've mentioned.

I'd go as far as saying Shaman is one of the strongest classes in the game, but only if played correctly by a skilled player, now that everything which made this class BS levels of strong has now been rightfully nerfed or fixed. There's definitely weak spots in Shaman's kit such as not being able to penetrate CCI at times, which causes Shaman to sometimes be weak against enemies, but those can be worked around by adept players who know what they're doing, since the AoE damage they provide can prove to be invaluable in many circumstances.