People saying the current system is fine are off base imo. At the very least, a personal meter should exist that gives you an impression of how you're doing relative to other players of the same job. Since the developers have gone on record issuing a zero tolerance policy for third party tools, saying "the option to measure your own damage exists" when "the option" is a third party tool really doesn't cut it. I don't even have anything against third party stuff, since a lot of it solves problems SE hasn't even acknowledged in a decade, but they can't have it both ways. They can't be like "no third party," but also "the option exists." Stop being lazy and giving this bullshit wink to your players and just let them measure their own skill in game so they know how they're doing. For example, when I hopped off of healing and began playing MCH as my first dps, I was making a huge mistake in the heat blast phase that I wasn't even aware of until someone I knew, who trusted me not to go apeshit and report them, told me "hey, you're underperforming and you need to be doing X" and I changed how I played because of that. Everything else in the game had led me to the false belief that I was doing just fine, but the reality was I'd been carried by people who knew what they were doing and were probably too scared to just tell me to play better.

I'll bring it up again: PvP gets a scoreboard at the end of every round that tells you how much damage you did at the end, and everyone can see everyone else's numbers. People continue to queue up for pvp without letting this stop them. There's no reason to not have a really basic similar scoreboard in pve. It lets individuals know if they could stand to do something differently, because it'll show their damage compared to others in the round. It also provides a legitimate objective in game basis for others to give helpful criticism without jeopardizing their whole account through tacit admission of third party tool use. And all of this is to say nothing of console players who will never have access to these third party tools for themselves, and could benefit from an in game system that at least tells them how they're doing. XIV does a lot of things well, but one thing it does poorly is teaching DPS how to play well, and correcting their poor playstyles. I play casually and I don't even bother with roulettes often, but when I heal them I'll get the slowest runs you've ever seen and when friends who went with me show me the logs, there are damage dealers doing less damage than I am as a WHM just spamming Glare, and it's not because they're dumb or something; it's because they're just making the wrong moves and have no idea because the game never stops them and says "hey, you shouldn't be using your ice spells this often," or "hey, you shouldn't be spamming your melee combo and nothing else as a rdm," or "hey, stop using bioblaster on a single target" and it straight up dissuades other players from telling them too.

Either give people in game ways to evaluate themselves, or relax restrictions on what we're allowed to say to each other in duties so I don't have to tiptoe around the embarrassing act of telling a level 90 tank to use his AoE in trash. And actually show people who get gaol'd, what they got gaol'd for. Jesus christ, how are we supposed to "never do it again" if we don't even know what IT is. This game's moderation policy is so goddamned stupid it's unreal, makes me not even want to queue up unless I have a full group to begin with.