i almost never used the blueprint library in 1.1, i would just store the blueprints i want to keep for every save like my compact fixed size science setups. Nuclear, stations rail etc. In every save i would just make BP and keep them in inventory of whatever i do a lot and when it was obsolete i just deleted it.
The 2.0 change has made me use the blueprint library and start organising it properly and its probably for the best because over the course of years i will make less duplicate blueprints but i can understand why people just wanna not need to care about that and just wanna go on a rocket. it honestly should just work and be optional to opitimise your style and 2.0 for better or worse forces you to "play properly" when it comes to BP storage.