What Should Be Added or Changed?

The ability to configure the templates and blueprints to be restricted to specific material levels, such as templates being for stone and wood levels. (possibly by tiers even)

Why Should This Be Done?

This allows for a more immersive and progression based gameplay.

Since tiers are being removed in 1.21, I'll have to think up some other solution for this. I was thinking about adding something similar to tags for materials (which would be used for repairs). Maybe that could be used here. Like a material group/tag for blueprints, and another for templates.