Full Wipe + Offline Workshop for Blueprints. (Empyrion)
Full Wipe but allow players the opportunity to maintain Blueprints in an offline mode, much like Empyrion. There's no reason to lose one's handwork, and better yet, this Workshop mode would allow people to experiment without needing to invest so much time/resources into getting to the point where they can THEN start testing. If you want to limit it, you could make it so that it's just one planet, moon, and space... if you don't want to just have people fully min/max a Construct in Workshop, before deploying it to the Live world.
