I guess I have a habit of remembering when people push incorrect assumptions as fact. If you don't like that then /shrug, consider doing a little research before pressing that post button.
Salt aside, I'm very much in agreement with the rest. People seem to play to the level that the content expects and sadly until you hit Extremes, FFXIV content expects basically nothing out of us. If we can find and click the queue roulette button, we can probably scrape through the content even if the reality is that the rest of the group are dragging us along for the ride. That by itself isn't entirely a detriment, but what is is the lack of any real incentive or even suggestion from the game to try and do better.Raising the skill ceiling is only going to make the problem worse. Where conent will become unclearable because of how bad people actually are. And you still won't be able to tell anybody to get better.
One suggestion I've consistently pushed to be considered is a simple ranking system at the end of each duty. SE can store the potency per second ratings for each job in a given duty as an overall average and then assign a basic A to F score to the player compared to that. It's zero maintenance and little work beyond it's initial addition as it'll just generate it's own scores using actual player data. It could potentially be tied into simple stuff like achievements or some other rewards, maybe bonus tomes for getting a higher rank for example. I think for more casual end game content like dungeons and 24 man, it'd be a neat addition and a big win for the health of the community if it manages to encourage even a modest number of people to try and up their game some.