I dont really find this all that cool, but then again im not into customization. I guess it could also increase the value of the weapon depending on how expensive the jewels in it are?
I don't care too much about the value of them. I have a ridiculous amount of gold that I could never spend, hence why having a use for jewels other than selling them would make them worth picking up (I realize you can make jewelry, but again, that's pretty limited).
It's like making every weapon/armor in every material(Eg: an ebony sword made in the style of Nordic Steel swords).
I don't mean making various models of each type of weapon. An ebony sword would still be an ebony sword, but it would just have rubies encrusted in the handle, or something like that.