I gonna put it blunt here, the OP's solution or any solution of this nature won't work: simply because people don't care.

This game is easy. Even without external resources it's not hard to figure out how thing work decently by yourself as long as one actively seek improvement like read the skill description, try out your rotation on dummy ...etc... And by decent, I don't mean people to get purple or even high blue parsers. Low blue or green is what I consider decent level, as in not amazing but at the very least one is not being a budern. And again, it's very simple to get to that level of play.

But you see people become butt-hurt when other talk about their performance. Have you ever tried to give advice in a dungeon run - in an informative-non-aggressive way - and see how it usually turns out? With so many resources out there, if any one player want to become better, barring physical disability they can become decent if they want to, fact is a lot just don't want to. You can create all the resources you want, as long as they're voluntary it doesn't matter the audience it was meant for doesn't care about using it. And if you try to enforce it ala WoW, why do you think there was a backslash against it.

I used to thought up my own solution to suggest. Something like an internal-private parse purely from an informative perspective. Like the game record your numbers and at the end of the run, inform you how you're performing comparing to the average, and it only display this result to you only. But then I bet even with that, instead of using that as a motivation to improve, there gonna be complain of nature like "I'm playing the game for fun my own way, I don't need the game to make me feel bad every time I run a dungeon!"