The reality that I live in as a long time player is that if all you've done is the normal difficulty content, get to level 80, and decide to do a current Extreme or Savage you are in for a rude awakening and a world of toxicity, because there is no middle ground bridging the gap in skill at all. Now this is what I've seen, so take my anecdotal evidence as you want. But I've been at the end of it when I was new, and I've seen it happen every tier this expansion and I've seen it happen in lots of Ex fights. If it weren't for a friend who helped me with my rotation years ago I wouldn't have even known there was an optimal rotation.
In order to not break TOS people simply stay quiet and boot the bad player most of the time. Without telling him why, trying to help him, explain anything. Because they know the person may get offended, report them, and have a GM take their side and ban them. Even if all they said is you need to work on your rotation and do this as "X" job. "Because that is enforcing a play style and is a TOS breach"
I think the effects of this are widely known, and felt throughout the entire game and chilling to the point it has killed off a lot of the social aspect of the game. Dungeon runs are silent, no one tries to explain anything. All you get is a "o/" and a "gg" at the end.
I honestly don't know how making the game easy has affected the health of subscriber numbers for the game. I honestly don't, the free trial, positive press/reviews and WOW fallout would make it impossible to determine imo. But if they are going to moderate this game as heavily as they do (and TBH that is fair, it does stop a lot of bad things from being said) then the game should have a better difficulty scale so that it can teach the players how to be better prepared for its end game challenges by punishing them with failure and deaths so they improve during their journey towards the end.
If the player reaches endgame, and wants to stay longer, these are the challenges they will face as a fighter.
Edit:
btw one the most appalling experiences in my gameplay so far is the way experienced players treat newbies on reset days (Tuesday) in the first fight of the tier.
Since this is the fight most newbies are still stuck on and trying to clear/learn but also experienced players have to go through the amount of passive aggressiveness, boots, and sometimes outright insults I've seen is so sad.
This is the point where plenty of players quit and wait for the next expansion if they ever return at all. They gave up, just thought they were bad at the game. I've been a witness to this more than once.