i like the original idea dont gate (strictly) the difficulties let people pick where they want to play .
trouble is you then go and add a bunch of weapon skins requiring all the boss kills on legend. and add in an event that also requires legend play.
so everyone is spamming legend QP rather than those ready for it choosing to move onto it.
and obviously when people are doing something becuse they want the loot not because they are capable of it the quality of the game goes through the floor and the frustration goes through the roof.