Combine XP and bps idea

Keep the XP system how it is in the current state and put the original bp sytestem back with some tweaking. Instead of libraries costing 1200 bps they now cost 2500 for example. You get best of both worlds.

When you learn a bp it will just unlock that item and you could start crafting it right away instead of using xp on it to unlock. Doesn't matter your level if you find a bolt with a library at lvl 10 you can craft unlimited amount as long as you have the resources.

Keep research table in its current state: learn an item with a limited amount of crafts.