It has nearly been a year and still we have tons of useful set items that could've been a players choice for gearing. Yet many item drops from sets are with traits such as well fitted and exploration. Why is that so? Why make such diversity among set bonuses with interesting mechanics, only to neglect it with terrible traits that prevents us from excelling and being subpar.

Reduce the RNG on trait randomness or make us able to change traits if you're a master crafter, or do something about it. It's a design decision that is halfmade.