The issue is, that each class only has a couple of legendary armor sets to choose from. And 2 of them are hard to get (Trials + full Hive). So everyone pretty much looks the same, just slightly different coloring. Meanwhile we all of this blue gear lying around that looks really good - some of it way better than some of the legendary stuff. It almost seems like a waste since you only wear those blue sets as intermediate stuff until you find something better while leveling up -- and then never again. It would add more diversity and customizability.