Light, medium, heavy armour transmutation
This has been requested a quite a bit since launch. I believe they would have did it already if they wanted to.
One conflict seems to be the number of dye channels not always matching across all weights and probably what areas dye where according to the armor weight. The game probably can’t handle pieces that have mismatched number of dye channels and areas that dye outside the armor weight they are transmuted to.
ANet may give it to you.
The mixing and matching of different armour weights is the key issue here- apparently the different armour weights are on different meshes (?) and thus can’t be combined without having to do an overhaul of the current system. Not to mention clipping issues as different armour weights have different “cut off points” on the body.
But if there was something to prevent you from combining different armour weights I don’t see a problem- or at least, I don’t know if there’s a technical issue that would prevent this from happening. I’m thinking perhaps you could have three different “skin templates”. When swapping around skins of mismatching weights, it would give you an error note and offer you to start playing dress-up in a fresh, clean template.