Hi
I'd just like to give my experience as a new/returning player that has never got past level 60 content. I'm currently around the Shiva encounter.
For the first 50 levels the dungeon experience is just overwhelming. I have played as a CNJ/WHM and the 4 man content at the start is just a rush to the finish and you can barely keep up with what is happening if you are doing it for the first time. An example is the Haukke manor where at one point all the members just disappeared. It was a good minute or so before I was told in chat to type /return at which point the tank had already started to pull and was low on health. My assumption is that /return would take you back to your home point/city. If i missed the point where it told you otherwise, my mistake.
Most of the time the fights end before you can understand any of the mechanics if there are any due to all other members being overpowered.
On the 8 man content at the end of ARR for the story quests, this is more of the same, if not more frantic.
On the 24 man raids (Crystal tower)which are now part of the MSQ, these have skippable cutscenes which I did as I feel guilty. These are not explained in any way at all, or at least in a way that's obvious and meaningful for someone new. These are blown threw in 15 minutes and again, i don't have a clue what happened in these dungeons and have had to go back and watch the cutscenes on youtube. Should i spend hours watching videos learning 4 mechanics that each boss has for 4 bosses that that will probably take 2-3 minutes to kill.
Another thing is the MSQ dungeons. The quests have a level against them and for the vast majority of the story quests, my level was way above that of the dungeons by only doing main story quests and class quests. I got the feeling that I shouldn't be doing these dungeons more than once or i will be over levelled for the story quests. Therefore blasting through it once and then never again, not to learn how to improve.
Ultimately up to the point where I am in the game, my participation feels like it hasn't mattered in the 8/24 man content and only slightly in the 4 man content due to how overpowered everyone is. If I just sat and following everyone around would the raid still be cleared, probably. There is no one telling me if I'm doing a good job or what to measure myself against unless the party wipes, then I'm still unclear if its my fault or not. I must be doing a good job though as I receive loads of recommendations, or is that just because I'm last out as I'm watching cutscenes and there's no one else to give it to?
I really dont think its new players not wanting to learn because I think the vast majority do want to. I have watched numerous youtube videos and read content to try to understand it better. But upto now i have yet to put anything into practice due to the speed runs and most being aimed at end game content. Ultimately I believe that there is just so much going on that its hard to know whats going on and what affect you are having on it. I cannot speak for higher level content but this is just my experience so far as a new player.