@sailorkek
Ahoy there. What your describing is what is Known as In Session Progression. Which is a system where by items ethier craft or bought, or otherwise obtained will benifit a player only for the current session there in. This is a subject i have alot of intrest in and have discussed alot on these forums. This has been a long time Topic of conversation with strong opinions on both.
I myself have advocated for such things. Particularly I want to expand on what we have now as there are some items in the game that already benfits player by granting them extra utility, Such as CCBs and Gpb.
You have some good idea's there some of which have been mentioned before. Crafting has also been ask for many times as the devs wish to regaurd this game as more of a sandbox style game.
The main argument agiasnt this is the preservation of a skill based system. Most player like the fact thats it's a very even playing feild and they can jump in when ever. So since the sessions are persistant some worry that a crew playing for 3 hours will have too great of an advantage over a crew that just loged in.
I feel however this would not be a problem if the effects were tied to loot as the loot can be stolen. Making a more difficult crew worth fighting as there loot from farming could become yours if you out pirate them.
I'm glad to see this topic bought up agian and this post may be a good canidate for the Community idea's Master List