Lots of people are okay with this increase of difficulty, including myself.

- What abuse are you talking about? It is a GOOD thing that they're developing mechanics, if all you expect is a stack marker, one tankbuster per fight and one orange circle this is very stale and boring.
I saw plenty of people play the normal content while watching youtube. Is this really where we want our game to go? To become an afk simulator?
- Judging from your post, you've never touched Extremes or Savages and trust me both harder content types are a step up from normal fights. If they make the fights easier yet again, all you will do is hinder players who want to reach higher.
Why should Extreme fights be infinitely harder, just because you want a fight with ARR type of mechanics?!
- The only mechanic I saw too be resolvign very fast SPOILERS! is the mechanic at the 4th boss where she charges the cannon and you have to memorise where to go. But the pattern is really not difficult.
Second point! It is FINE to WIPE! Wiping is GOOD! You learn what happened wrong, you ASK what happened, nobody will be upset for failing the mechanics.
- The only bad side to such mechs is that snapshots can be dependant on server, but sometimes you have to respect the content and don't have to "Always Be Casting" every moment of the fight.

Thinking not wanting to be on duty might be your anxiety speaking up and not necessarily fault of the content.
You will die doing new content especially if it's not braindead easy like previous expansions have been. That is okay. Think what happened then, look what the boss does and next time you won't die.
If you really can't learn the mechanics, try playing a tank. Tanks are extremely resilient and can take mechanics even with multiple stacks of vulnerability.

Why are you gonna skip the raids? Why do you want the raids to be easy? Trials != Raids.
If you don't want to learn the fight, why do you want to ruin the experience for people who like a challenge, we're not talking about extreme levels of fights.
If you're afraid of trials, you can try doing them with trusts, from what I know all trials in this expansion are trust supported.

Duty Finder content doesn't mean it's that easy that I can watch youtube videos on the side. If you don't put any effort in the game, why should game reward that?
You're level ONE HUNDRED - 100.
All you're doing with your complaining is increasing the gap between casual and midcore players and that is a BAD thing.

So what would a midcore player like me have? Savages require quite a commitment, Ultimates even more. Extremes are a nice mix, but I'm not playing extremes every day.
You have to step out of your closet and make an effort. Normal raids are still much easier than extremes, extremely easier and non-comitting (aka casual like) than Savages not to mention Ultimates.

"Can casual players have something easy-ish to play?"
No. It's called normal content.