There's some misconceptions floating around.
Clothing decay has not been in since beta.
Repeat, clothing decay has not been in since beta.
This is also why there is no UXP for clothing (UXP is currently granted only for items that decay, such as weapons and armor, or for consumables). We removed time-based decay from all sorts of things in beta because players didn't like the idea of stuff simply decaying away based on time.
Do we agree that clothing could USE decay? Yes, because the market could stand to have ongoing demand, just as you point out.
But all we did in this mni-patch was remove an obsolete field on schematics that was not being used by the game.
Our current thinking for clothing decay is the death idea I floated in a thread yesterday. Basically, all items in inventory or equipped (including clothing) would suffer some damage when you get incapped, unless they were insured.
This would then provide decay to a whole host of things that currently do not have it.