As some people already said, the current braindead battle system attracted A LOT of players. And while it is good for the game (money, fame,
more money) for now, it is absolutely horrible for long time players and players seeking interesting gameplay.
And as long as the game will keep growing and generate money - things are going to get even worse. Because SE in their last two expansions are trying to polish away even the tiniest of edges that will bring average player dissatisfaction.
I totally can imagine them buffing other tanks survivability to Warrior level, so noone is upset. And to bury healer class another couple of feet deeper.
They are running into a corner with hard content design:
The healing/mitigation/recovery tools are so strong and free that there's nothing else for the boss to do except vomit body checks at every other mechanic, otherwise the dead players will be up in seconds and the whole party hp full.
And to somehow make pressing the same 2 minute rotation over and over again interesting, the party must do a combination of strict dance moves around the arena. Failing any of the moves will set off the nuclear explosion that will reset your run.
If this will carry over to Dawntrail raids -
God help us.
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Now, about Normal content. I miss unique mechanics so much. Everything is just "Dodge, dodge, dodge" and a selection from the pool of basic mechanics: "Stack/spread, in/out, left/right". Rarely, an interesting gimmick mechanic emerges, but after a couple of weeks it gets outgeared into obscurity.
Raids, Trials and especially Alliance raids are all undertuned: bosses spend 80% of the fight just to show their mechanics and are mostly already dead before anything interesting even begins. Mechanics themselves takes years to arrive and if you are new - just follow a deathblob of players and in 99% you will be fine.
Player specific mechanics that can affect the party
(that are not generic stack marker or Tankbuster) are fucking extinct in Endwalker.
If this trend also carries over to Dawntrail... this is just sad.