Ive never once felt the sneak mechanic was a problem, Id argue its actually a good mechanic in its current state (minus bugs where you cant ever come out of 'detected' status because a wolf across the map smelled your lunch and is just standing in place).

Invisibility I can understand. however, I didnt think previous iterations of invis were a problem either, theres numerous tools to pull people out of stealth, including very generous ranges on detect pots, which are easily craftable. Players learning to look for and deal with stealth players is a more appropriate course of action at this point imo. maybe ZOS can implement a Training room that actually covers these mechanics (im sure theres some tutorial on sneaking/stealth, but I dont remember it if there is, and I doubt it covers pulling players out of stealth).

the training room idea could be useful for a lot of mechanics throughout the game, and not just at the start of creating a new character. Think training dummy, but it can perform different mechanics, whether its going invisible, stunning, immobilizing, snaring you, using rush of agony and breaking its own rules, moving in a circle so you can practice not being detected, etc.

There are already a lot of possibilities to counter stealth, so no change is needed.

I would not like more limitations on sneaking. Actually, I'd like if Werewolf was given the ability to sneak, to be on par with everyone else.

I think every playstyle should be allowed to sneak and have some interesting interactions with the stealth system. Stealth isn't exclusive to Nightblades and/or Vampires nor should it be.