So, technically this is a bug but maybe it's a good bug?
After getting an exceptional craft, use gems to upgrade the quality. Then, close the pop up using the Esc key (PC) or the back button on your phone. You won't see exceptional craft pop ups for the rest of the play session. If you use a really low level item (like level 2 pocket knives) it only costs 1 gem to upgrade from great to flawless.
Anyway, figured I'd post this here for those who don't watch WC or discord. Also, it would be nice if Darkis or Tethys could chime in on if this is allowed, since it's technically a glitch. ^^;