As a 10/10M raider I think this is the worst idea I've heard in months. Attunements are a boring time sink with no value or challenge. All it does is hurt people who are strapped for time. No one has ever done an attunement and said "That was challenging, fun, and improved the overall quality of the game."
The OP is sitting here wining about the game being too casual friendly while literally having 0 mythic boss kills the entire expansion. I'm sorry man. I don't know how to say this in a nicer way, but you ARE the casual player you are complaining about. No need to make things worse for yourself. If you want to make the game more challenging then just make more challenging content. Don't add more useless timesinks. Or you could like... go do some of the challenging content in the game that you literally haven't touched what so ever.
Edit: ok this guy has literally done one +5 M+ since legion came out. That's it. You can't not participate in literally 99.99% of the end game content available then complain about lack of difficulty and want a shitty timesink. Mind blowing.
**Reads ops signature** oh hes a trump supporter. Everything is clear now.