jewels discussion: bringing RNG and Economy to the Passive Tree

I think you are inflating the problem. You should be able to make jewels which suit your build easily, I would imagine. It might not be perfect compared to those who trade for it, but unless you are trying to somehow compete with these people, what jewels other people have should not affect you.

Now, if getting basic jewels which complement your build is harder than I expect it to be, that's a different issue. However, considering getting basic gear for your build isn't that hard, I don't imagine jewels will be any different.