I was thinking again of the legendary trinket effects that can't be hidden.
As I remember the dev comment was, that it is difficult and they can't be sure if the effects would stay the same.
So some people think they will look into it after EoD, some think they won't because of maybe changing effects.
Therefore my easy to implement idea that would solve the problem:
Make an achievement to have 2 legendary accessories. This achievement rewards 2 legendary accessories without effects.
Same for rings, if you have 2 legendary rings you get one without effect.
It won't change anything if a player has 2 or 4 legendary accessories since only 2 can be used at the same time. Same for rings.
But It would allow us to equip them without having the effects. (at least if you have 2 of them)