I think cloning was somewhat common in Amaurot, Hemera's clones were just exceptionally unique! So technically no..... however...

I do believe Emet-Selch created "soul-compatible" clones, unlike Lahabrea's body hopping, due to some stuff he picked up from Hemera. I think the soul and the body aren't wholly separate things as far as Sveinncanon goes, and the incompatibility between Lahabrea's hosts and his soul, the dissonance, is part of why he went mad. So Emet does keep Hemera's teachings in mind.