In 2016, an update was made so learning a recipe from a consumable on one character will unlock it for all other characters on your account, according to the wiki. Why not make crafting levels account-wide also? So that if you complete a level of one crafting discipline on a character, that level of that crafting discipline is unlocked for all characters on the account, even the ones you haven't created yet. It would remove the inconvenience of having to switch back and forth between characters to get components from different characters' inventory. This would also be nice for players who deleted a character, perhaps if they were thinking of quitting the game.
If the devs think this is too easy, the feature could also be made into a mastery unlock, or an unlock by gem store purchase. I would buy it.