Captured Villagers

What if you added special Villager variants that can only be found caged in Pillager Outposts. They could do special things like the Merchants in Minecraft Dungeons. The special things they do could be, switching enchantments, repairing items, trading random items, etc. These new variants could even follow you until they find a bed to sleep in and lower their prices once they do, which could entice players to find a home for them so they can get cheaper trades.