Suggestion for Villager Changes

I don't believe villagers need to be changed in a way to "balance" them out, especially not like suggested in the 23W31A snapshot. There are various types of players and not all are explorers that want to go find biomes for the trades or struggle to get equipment or items needed to play as they want to (Redstone, building, mining, etc). However, if villagers do need to be "balanced out" through biomes, it shouldn't be to the villager directly. Instead, players should "give" librarians a book trade by giving them a token or a scroll or something. It can be similar to trims where each one is in different location and does different things (but easier than trims since I think those are overcomplicated and very hard to get). For example, the taiga biome would have the taiga scroll which would teach the librarian the Efficiency trade. Each scroll is one level so for Efficiency 5, you need 5 scrolls. These scrolls would be in new "mini" structures like abandoned shrines or camps (where ancient librarians once rested during their travels to learn new skills). Without scrolls, librarians can trade items like compasses or name tags. If the change is directly to the villagers, as proposed, and they are to be from different areas, then villagers should at least be made much easier to move (e.g. they follow you if you hold emerald or you can tie them with leads).