When you have tons of villagers in a trading hall it is hard to know which is which without signs or something. I use the traders to reduce lag so adding signs seems kind of redundant. I suggest an option to rename the Trader blocks either in an anvil and then placed (like chests) or just in a GUI in the trader. That way when we walk past them, WAILA and various other versions of it will just say "Mending" or "Golden Carrots" or even "Billy Bob Mc Jr" or whatever else you want to set the name to.

It'll just make identifying which villager is which without just adding tons of signs which doesn't seem very modded to me.

This is already a thing. Just rename the villagers in an anvil.