I think they should ease up the chance to find high tier blueprints , their so many after all. Less grind is always appreciated , some blueprints are so rare that finding them you will quit automatically and that's it , i'm so tired of this blueprint farm that i don't even bother to sell them anymore i don't want to see a chest anymore.
It's cool they are rare because it provides us with things we can sell. Blueprints are honestly stuff people want to buy, it would be sad if anyone could just go and search some encounters and get the best ones. What's the point in that case. It's good that we have a "haves and don't haves" situation. It's cool that players specialize into something.
Some people will always have such attitude that they want everything now and don't want to deal with other players. Should we listen to them?
What should be done is to make bp searching fun. It can be time consuming as long as it's fun. This can be done with solid mechanics and good features.
For example a quest where you have to penetrate a vault filled with monsters and other dangers. It has several levels and the deepest ones are the most challenging but also have guaranteed chance to find one of the best blueprints. You go there alone and if you die, it's game over. Otherwise people will abuse the shit out of it.
As a tradeoff to guaranteed chance to find them, blueprints should have expiration time to increase the longevity of the feature. Blueprint could have for example 30 uses and then it expires. How does that make any sense? It doesn't, but that makes people want to have more blueprints all the time.