Think its was because of things like
Meta,Elitism, players not knowing what to do with their class, jobs being ignored from raid parties etc.
Not saying that they shouldn't but thats kinda the logic and push that was made into this whole don't risk it for the biscuit mentality they have now
Also they didn't really know what they wanted from the classes so you see a lot of experimenting but now they have a idea whether liked or not
they will stick with it