The difficulty of normal content is great as is. Do not revert them.

[jdtuggey]

But that's details, the issue is that SE needs to stop base everything on mechanics and bring back player power and skills. Then, difficult content will be able to get gated by these as well, not just by reaction speed and memorization of patterns.

By player power, do you mean gear ? Like, I play this game on and off, I sub for 3 months, then I unsub for 3 more, come back for 3 months, that sort of pattern.
Having a system where I need to spend significant time "catching up" each time I resub would make resubbing a lot less appealing.

Player skills, well... If you mean talent, I'd classify being able to handle mechanics and push decent dps is skill ?
Like, you'd know this if you did savage/ult prog, but not only you need to handle the mechanics there, you need to push dps hard as much as you can, while moving, often, while preparing for the next mechanic.
There's a lot of space between the floor of the casual content and the floor to prog Savage and especially ultimates ? I'd call that gap "skill" ? Like, execution actually matters there.
Even in dungeons, like, memorizing the patterns is the low bar, you can set yourself a higher bar and do "push dps hard as much as you can, even while moving, while preparing for the next mechanic", you'll make a better experience for everyone in your party, and it certainly does look to me like there's a skill gap even in that niche, some players definitely do a lot better than other players in dungeons, even if both players execute mechanics perfectly and know the patterns perfectly. And well, if your party plays well enough, you might even be rewarded by having less mechanics to deal with.
If you mean buttons on your hotbar, don't we have enough ? :P

How would you even define skill if not how I defined it there ?