villager advancement

I think there should be more advancement about villager and i thought about a brand new one and i think a good name for it would be master trader and you will need to get this by trading with each villager and these would be Armorer, Butcher, Cartographer, Cleric, Farmer, Fisherman, Fletcher, Leatherworker, Librarian, Mason, Shepherd, Toolsmith, and Weaponsmith. I as a person that likes to play around villagers think that it would make some forgaten villager come back to life and some people have no idea how to use them so they would actully try to now, i origanly thought you would need to trade once but you might have to go to a level of the villager and maybe it would change on the Difficulty level ( It doesent have to be execly the same you could do some changing ) If this does get chosen please make it on java because that's what i play it on