Faerie Fire Bowls have a need for UD crafters according to the wiki, but does not include a few UD races.
Ingame, the list reads;
Duergar
Svirfneblin
Goblin
Kobold
Orog
Drow
Ogre
Hobgoblin
Imp
Deep Imasakri
This excludes some other UD races such as Derro, Gloamings, Gnolls, and Minotaurs. I think this is more a possible oversight of races and newer additions, which I think the small adjustment would be good.