I agree with all of your post here, but if I can say one reason why this is happening: New people are starting with 4 expansions with 0 waiting time between them to play. If I can give 1 praise to lull periods in Final Fantasy, its that people are practicing their jobs doing whatever content to help fill for their time. I started playing late ShB and when I got up to the current content; there was still some mechanic terms that I didn't know.

I never had time to kind of explore the game and fully understand what the heck is going on. Now after I took a break, I came back with a new character and went through the story again, and then we had this looooong wait until Endwalker dropped. Me as a player has developed a lot during that waiting period. I know there are players who started from ARR, HW, SB, or ShB like myself. I am sure we don't get how some players get through so much of the game's content with so little information since we been here a lot longer.

I really did appreciate the ARR MSQ dungeon revamps because they do introduce the red tank buster icon, running from one aoe to the next, and so forth. Its a nice introduction to mechanics. They are doing the same for Heavensward soon; I truly hope they throw every kind of mechanic in there so players are getting the idea of what is happening because the NPCs are doing it.

I don't know.. I scratch my head a lot on this topic. I've been a healer main in all content including Savage. I have carried a lot of tanks through their dungeons because I just wanted to get through it without any drama. I've only left a handful of times due to reasons like these. Very rarely I would have to report for toxic behavior. I try my best not to if I can help it.

But I do agree; I think it would make the whole community happier if people know what they were doing in later content that has already rinse and repeated mechanics/methods multiple of times throughout the MSQ . SE introduces unique mechanics little at at time; but boy they still use all mechanics going back to ARR all the time. They literally beat that stuff into every player, and then challenges them to do it again in a different or a faster way.

Its baffling that people don't know some of the basic stuffs; but it happens all the time. My only say is keep trying to be helpful so proper information is being spread throughout the community, and hope that SE will keep updating their game where mechanics are naturally taught in the MSQ more often.