As the title states, the fact that transmutations are limited solely to trait types seems rather ridiculous. One of the most frustrating problems I have is when Im making a new character and im grinding dozens of keys (sometimes many more than that) trying for one singular monster shoulder type ( be it, light, medium, or heavy) and often times i'll get everything i don't need. For example, i have used close to fifty keys trying to get a medium or light (preferably light) Ilambris shoulder type, but more often than not i won't get the right monster set, or less commonly, i'll get the shoulder i want, but not the armor type i need (thus far i've only gotten heavy types). This endless rng nightmare that is completely stacked against you is driving me completely up the wall.
I have never understood why we don't have the ability to transmute an armor from one class to another (like light into heavy, heavy to medium, etc, etc). It would get rid of this incredibly frustrating feeling when you spend days or even weeks trying to get that one shoulder you want.
It's not just monster sets that would benefit from this though, imagine being able to take a chest piece you so lovingly crafted from scratch and golded out and being and to transmute its type to suit a new build.
I won't deny that this comes from a place where i'm feeling horribly frustrated at the fact that i've wasted a *ton* of keys looking for one single kind of monster set shoulders, but it doesn't change the fact that this idea feels like something that should have been a thing when transmutation was first introduced with Clockwork City. And if not then, then better late than never.
Of course the same stipulations that come from transmuting would apply to them, any item you transmute the armor type for would become bound to you (assume it wasn't already), it'd still cost 50 transmutation crystals (because non eso+ players cant go over that) and it would give us a solution to a horribly designed 'rewards' system.