Though not explicit in the lore, this is meant to be the case, with orcs born from the process more violent and emotionless than previous generations. It's a patch fix for the war effort, with the idea that a more sustainable solution can be found after the war. In the orc campaign they'll come to realise that a quick patch isn't good enough.ProfessorCirno wrote: 2) Add a note in the lore that any and all orcs born through this measure, regardless of gender, are sterile.
I like your idea about the "breeding units" being more visually machine / corrupted magic blight thing. Probably best coming back to this at a much later time though. Hasty patches haven't proved well so far!