WoW is hardly simple as that.
And its also not streamline in itself its...less call it difficult community and heck even devs might enforce a certain meta but it has way way more freedom of choice in its skill trees.
And the Devs play arms race with third party tools and what else i could mention here. It has different problems as FF14 as it is a different game.

Well you seem mostly complain about other people Miss Kurosawa
Instead of telling us why all the people that give feedback and debate are wrong how about you share what design elements you really like and you would dislike if they would vanish.