Adding a vendor recipe to switch Exceptional Gems

Hello.
Having a determined exceptional gem is still a hell in SSF.
the divine font in the lab with the exceptional gem is very rare and when you have it, you only have one chance on three (perhaps less if it's weighted) to have the good one.
It's very frustrating because the labyrinth is not a map and it's a real waste of time to farm it.

So I propose to add a vendor recipe to switch a exceptional gem for another:

a non-corrupted exceptional gem + any support gem with another color + a divine orb => the exceptional gem lvl 1 that is the color not used in the recipe

that would change nothing for trade league (because it costs much less than a divine orb in trade) and would help a lot people in SSF.