Make Blueprints a Consumeable, Tied to the character who learns it.

[DaOpa 4]

Change the way blueprints work to make them into a consumable, you consume it and it will show up in the recipe list. Once its charges are finished, it gets deleted.

[Fizzenator 7]

I think that's a neat idea but highly unnecessary. They don't weigh much, only issue is inventory space. What if someone trolls you or accidentally consumes all the blueprints, people will get salty and bitchy. That person will then have to be on if they plan to create the contents of the blueprint. What about blueprints that require different structures to be crafted in? 

Edited January 14, 2019 by Fizzenator