PLOT HOLE
Kohga obviously ALREADY HAS his own Autobuild power. It's also way faster. I can't find a way to dismiss this oversight in writing. Thoughts?
Schema Stones don't count because there's only 12 "Schema Stones" (Zonai origin), and the designs are less useful to the Yiga. Yiga have their own better designs, and more of them, many of which aren't documented in their 34 Yiga Schematics. So whether or not Kohga's Autopoof-build power is creating copies or moving existing creations (I've been all over every inch of the depths, they don't already exist somewhere.), it's irrelevant because SOMEONE has to build the things first.
What Kohga really wants is Ultrahand.
EDIT: How about some critical thinking and discussion instead of childish auto-downvoting a criticism?
EDIT: My conclusion is this: Nintendo did a fabulous job A-B testing on their user base and determined most would be too ____ to fully grasp the plot hole even if pointed out directly.