There needs to be a term for someone who exists between the continuum of min/maxers and people who daydream about which NPC they'd like to marry.
There are plenty of variations. However, I have not seen anyone try use a hard CC in a dungeon in about 2 years. While I have plenty of good players to run with I often queue for a random dungeon so I see a full spectrum of players in the game and have not seen anyone try to use a hard CC like what the sorc and NB have.
To be honest, there are no mobs that really justify using a hard CC. In trials adds are probably immune.
It is just not needed and probably takes longer to setup than it is worth.
.. as they exist now. Why is the idea that they could introduce a game mechanic that interacts with the world differently than what is in the game now so hard to grasp for you. The general idea is that it would be a hard hold that doesn't break with damage taken. Obviously it would be for less time. This isn't exactly unheard of. And is common across many games.
ESO's Classes are always going to be bad. ESO simply cant compete with good games what offer totally different classes and playstyle. Just like Overwatch it offers amazing playstyle variation.
That said, ESO should focus on Weapons and make them huge part of the game. Just add tons and tons of them, those pull people in, 100%. Even I had to overhaul the current weapons to make room for new exciting weapons.