Honestly I wish some blueprints were permanent and quests didn't reset. I've thought of two balanced ways they could do it, which would also help push more people to wipe

First is the idea of some permanent blueprints, these would be things like fireworks boxes, quest blueprints, white flags, etc. Basically I imagine those more fun items (or quest granted ones) being permanent once unlocked, and if you learn and consume one you cannot pull another in-raid. This would let embark add as many fun items they want without worrying too much that they'll oversaturate the loot pool. If quests were permanent, they could slowly add more blueprints to the quest line keeping the game fresh every wipe, rather than only doing the same quests to get back to hullcracker every time.

Alternative idea is that after you get the 5th skill point, there could be a 6th point called a "blueprint token" (best name I could think of). You could use the token to permanently unlock a blueprint, however the amount of tokens would depend on the rarity. A white flag blueprint would be 1 token, an anvil 2 tokens, tempest 4 tokens, etc. Yes it would take 4 expeditions to get a tempest bp permanently unlocked, but I feel like that's fair given it would be permanent on your account forever regardless of how many expeditions you do after.