Mending Accessibility

Mending should be a rare enchantment for rare utilities that player don't want to lose.

However, it is to easy to obtain it. Just get a villager with mending, and it sells it for 12 emeralds, and if cured, for 1 emerald.
With the new baby mobs drop, and the ability to craft a name tag, the Master-level librarian trade is useless and so on, it will be removed.
I suggest moving Mending to the final (Master-level) librarian trade with a lower appearance chance. For late game tools.
This preventing early mending that makes players do not trade good tools for better ones.

This would still keep Mending accessible, but better aligned with late-game progression.