Just as the Dimensional Engine supplanted the fission reactor, the DTR will eventually replace the D-Engine. Once they iron out the little bugs.
Somehow, someway, a band of gnomes learns how to be ninjas. In fine gnomish style, they open an academy to teach this art to other gnomes. Wacky Hijinks ensue. Or the gnomes become some of the finest assassins in the land. Or both.