If that's easily doable that would be awesome. Especially for people that make a mistake or are uninformed and make a bad choice on a stat and want to change a stat without trashing the whole piece of gear. Also it might make a piece you are selling more valuable if someone knows they can change one of the stats to suit them better. Maybe 10 orbs instead of 15.
This wish is kind of fullfilled with the introduction of weld tokens. With weld tokens you can re-activate any weldshrine, and re-use it to weld-off a stat from any item! Get your weldtokens from the clan clerk (cj shop).